Webb’s first instrument is ready for science!
The first of the James Webb Space Telescope’s four instruments has been declared ready for science. The Near-Infrared Imager and Slitless Spectrograph instrument, or NIRISS, is designed to help scientists study the atmospheres of exoplanets, among other science tasks. Read more>
Meanwhile, space fans around the globe are counting down to July 12, when NASA has said it will unveil the first science images from the observatory. You’ll be able to watch the announcement live on Space.com, of course, and stay tuned for more coverage.
Webb suffers first micrometeoroid impacts
The James Webb Space Telescope has suffered its first few micrometeoroid impacts, according to a NASA statement. The observatory has experienced four small impacts as well as one larger strike that hit one of the 18 primary mirror segments. However, the agency said that it does not expect meaningful changes to the timeline for first science-quality images from the mission or to the observatory’s overall scientific legacy. Read more>
Mark your calendars!
NASA has announced that it will unveil the first science-quality images from the James Webb Space Telescope on July 12. We don’t yet know what celestial objects those images will show — but they should be incredible. “These images will be the culmination of decades of dedication, talent, and dreams — but they will also be just the beginning,” Eric Smith, Webb program scientist at NASA, said in a statement. Read more>
Webb tracked an asteroid for the first time
The James Webb Space Telescope has successfully tracked an asteroid, an important testing milestone that proves the observatory can monitor objects within our solar system that appear to be moving quite quickly. Read more>
Webb is in the homestretch of commissioning
NASA offered an update on the commissioning of the James Webb Space Telescope on Monday (May 9), which highlighted a test image taken by its Mid-Infrared Instrument, or MIRI. The agency compared the new image, showing part of the neighboring Large Magellanic Cloud galaxy, with one taken by NASA’s previous infrared observatory, the retired Spitzer Space Telescope. Read more>
NASA will update on Webb’s final prep stages
The James Webb Space Telescope is entering its final commissioning phase before beginning science operations this summer. The last phase will focus on testing the instruments aboard the observatory and is expected to take about two months.
NASA personnel will update the public about the telescope’s progress so far and what remains to be done during a news conference on Monday (May 9) at 11 a.m. EDT (1500 GMT), which you can watch here on Space.com courtesy of the agency or directly at the agency’s website.
Webb is fully aligned and the views are stunning!
The three-month process of aligning the James Webb Space Telescope’s instruments and mirrors is finally complete, according to a NASA statement released today (April 28). The agency shared sample images that, while small, showcase the sharp focus of the instrument and offer a tantalizing look at what’s to come. Read more>
Webb cools down
In a new update, NASA revealed that the James Webb Space Telescope is almost fully-cooled.
Webb observes in infrared light, which we know best as heat. To make sure its observations aren’t contaminated by any heat from the scope itself, Webb has to be extremely cold. In a new blog post (opens in new tab), NASA shared that the space telescope is very close to its final temperature.
Webb’s Mid-Infrared Instrument (MIRI) is now cooled to under 7 kelvins (-447 degrees Fahrenheit (-266 degrees Celsius) and so Webb’s instruments are all at their operating temperatures. Now, the scope’s mirrors just need to reach their final cooled-down temperatures.
Webb meets crucial temperature milestone
The James Webb Space Telescope’s Mid-Infrared Instrument (MIRI) finally reached the super-cold temperature needed to operate as designed. Because the instrument targets infrared light, which manifests as heat, the instrument must remain under 7 degrees Kelvin, which is equivalent to minus 447 degrees Fahrenheit (minus 266 degrees Celsius). And after a complicated, careful cooling process, that milestone has been reached, according to NASA. Read more>
James Webb Space Telescope most heat-sensitive instrument cooling to absolute zero
The James Webb Space Telescope continues to cool down to its operating temperature of minus 369.4 degrees Fahrenheit ( minus 223 degrees Celsius) as it prepares to take its first scientific images of the distant universe this summer. One of the telescope’s four instruments, the Mid-InfraRed Instrument (MIRI), needs some extra help from a dedicated cryocooler as it needs to get to an even colder temperature of minus 447 degrees F ( minus 266 degrees C), only 12 degrees F (7 degrees C) above absolute zero, the temperature where the motion of atoms stops.
Just one alignment left
The James Webb Space Telescope has just one step of its seven-phase alignment process left to complete, NASA announced on April 1. The remaining step requires that the observatory’s most heat-sensitive instrument, the mid-infrared instrument or MIRI cool even farther. That should occur in the next few weeks, NASA said, at which point mission personnel can begin calibrating the observatory’s instruments. Read more>
Europe’s Gaia observatory spies James Webb Space Telescope (photo)
Europe’s star-mapping Gaia space observatory managed to snap an image of NASA’s $10 billion James Webb Space Telescope on Feb. 18, when the duo were about 620,000 miles (1 million kilometers) apart, we learned today (March 16).
You can’t see much of Webb — it appears as a faint speck against a field of stars — but spotting the scope at all is a real achievement. Read our full story here.
James Webb Space Telescope notches “fine phasing” alignment milestone
The James Webb Space Telescope keeps checking off boxes on the way toward the start of science operations this summer.
The Webb team has aligned the $10 billion scope’s 18 primary mirror segments and focused them on a single star, NASA officials announced today (March 16). More fine-tuning work remains, but it’s a huge milestone for the mission and for NASA.
“More than 20 years ago, the Webb team set out to build the most powerful telescope that anyone has ever put in space and came up with an audacious optical design to meet demanding science goals,” Thomas Zurbuchen, associate administrator for NASA’s Science Mission Directorate, said in a statement today. “Today we can say that design is going to deliver.”
Read the ful story here.
NASA promises Wednesday Webb update and new image
NASA will update the public on Wednesday about progress aligning the James Webb Space Telescope’s primary mirror. The golden mirror is made up of 18 hexagonal segments that must be in perfect alignment for the observatory to capture sharp images.
And it sounds like that process is going well: NASA has promised a new image as well. “Participants will share progress made in aligning Webb’s mirrors, resulting in a fully focused image of a single star,” NASA officials wrote in a statement (opens in new tab).
The NASA briefing will begin on Wednesday (March 16) at 12 p.m. EDT (1600 GMT) and you can watch live here at Space.com or directly via the agency’s YouTube. Speakers will include:
- Thomas Zurbuchen, associate administrator, Science Mission Directorate, NASA Headquarters in Washington
- Lee Feinberg, Webb optical telescope element manager, NASA’s Goddard Space Flight Center in Greenbelt, Maryland
- Marshall Perrin, Webb deputy telescope scientist, Space Telescope Science Institute in Baltimore
- Jane Rigby, Webb operations project scientist, Goddard
- Erin Wolf, Webb program manager, Ball Aerospace in Broomfield, Colorado
Webb telescope to study quasars, Kuiper Belt
As the James Webb Space Telescope continues its checkout tests in deep-space, scientists continue to eagerly await the flood of science discoveries they hope to make with the $10 billion space observatory.
Our latest updates on the Webb space telescope’s mission have to do with the Kuiper Belt and quasars, targets both near (in astronomical scales) and far that Webb will observe to better understand the universe.
First, the Kuiper Belt, which is home to icy objects leftover from the formation of the solar system. As contributing writer Elizabeth Howell writes today, some of Webb’s earliest tasks will be to observe brilliant quasars at the heart of distant galaxies to study how these distant objects (powered by black holes billions of times the mass of our sun) shaped the early universe. You can read the full story here.
More closer to home is the Kuiper Belt, the stomping grounds for Pluto and its biggest moon Charon, which will be a target for Webb. As contributing writer Stefanie Waldek reports, another one of Webb’s early science goals will be to observe Pluto and some other objects in the Kuiper Belt at the fringe of the solar system to track them over time and learn about their surface chemistry and why there is such a diverse range of objects there.
“Using Webb, we will be able to get information about surface chemistry that might be able to give us some clues into why there are these different populations in the Kuiper Belt,” Heidi Hammel, a Webb interdisciplinary scientist for solar system observations, said in a statement.
Webb instrument work continues
NASA engineers are working on the fourth stage of the long process to align the mirrors of the James Webb Space Telescope, according to a new statement from the agency.
The observatory’s Near-Infrared Spectrograph (NIRSpec) instrument has finished initial check-out and its three key mechanisms have successfully been characterized, the statement noted. The instrument will allow Webb to study the “fingerprint” of light of up to 100 galaxies at a time, giving scientists crucial information about mass, temperature and chemical composition.
We’re also highlighting more of the research that Webb will execute once science observations begin, including studying strange “sub-Neptunes” and evaluating how the activity of stars might affect nearby planets.
Nearly halfway through mirror alignment
Image 1 of 2
The James Webb Space Telescope team just completed the third of seven planned steps to align the 18 segments of Webb’s big mirror.
During the second stage, called “segment alignment,” the team corrected the positions of Webb’s primary mirror segments and updated the alignment of the secondary mirror to bring the 18 individual images into focus. They then stacked the 18 images to produce one unified image. “After future alignment steps, the image will be even sharper,” NASA officials said in a statement Friday (Feb. 25).
Webb instrument work continues smoothly
As the James Webb Space Telescope continues the slow commissioning phase, work is going smoothly, according to a NASA statement published Thursday (Feb. 24). That update notes details about progress in several instruments, including filter wheel calibration for the Near Infrared Imager and Slitless Spectrograph (NIRISS) and wheel tuning for the Near Infrared Camera (NIRCam). Engineers are also working to precisely align the 18 hexagonal segments that make up the observatory’s massive golden mirror.
Science observations are not expected to begin until this summer, but there’s plenty of science to get excited about during the wait. That science includes plans to contribute to the Event Horizon Telescope’s observations of the black hole at the center of the Milky Way and a program to observe star formation currently hidden by layers of dust.
The first image NASA shared from the brand new James Webb Space Telescope showed a star warped over 18 different images due to inconsistencies in the mirror’s alignment. Just a week later, a new image still shows one star 18 times, but now the sparkle forms a sort of cosmic snowflake as the observatory’s image has sharpened. Read more>
Science sneak peek: interstellar asteroids
While James Webb Space Telescope engineers continue aligning the observatory’s segmented golden mirror, scientists are looking ahead to the research the telescope will begin conducting this summer. Overall, the observations will range from our own solar system to the very earliest days of the universe.
One example of what astronomers hope to do with Webb? Study any interstellar objects that come rushing through our solar system. To date, scientists have spotted two: ‘Oumuamua in 2017 and Comet Borisov in 2018. But the James Webb Space Telescope is more powerful than anything in the sky during those two visits, plus it has the capacity to observe in infrared, a key skill. Read more>
It’s a lock!
The James Webb Space Telescope’s Fine Guidance Sensor has successfully locked onto a star for the first time, according to a NASA statement. The instrument plays a crucial role facilitating observations, since it keeps the telescope pointing toward the proper target. Read more>
Before science observations can begin, however, the observatory still needs to finish aligning the 18 hexagonal segments of its golden primary mirror, a process that the Fine Guidance Sensor also supports. Although Webb has begun gathering observations and shared its first images last week, those will show the same star multiple times until the mirror segments are properly aligned.
Webb mission team ecstatic over first images
Today (Feb. 11), NASA revealed that the James Webb Space Telescope has captured its first images of starlight.
And, while the mission team is still cautiously looking ahead as there is much work to be done before the scope is fully operational and ready to begin science observations, they are ecstatic.
“After all these years, to actually see data when we’re in zero gravity in space, it is emotional,” Lee Feinberg, the Webb optical telescope element manager at NASA’s Goddard Space Flight Center in Maryland, told Space.com today during a news conference
However, “We still are being a little cautious, because we still have things that we have to get through … but I will definitely say when I went home Saturday night, two days later [after the image was taken], I know my wife said to me it was the first time she’d seen me smile since December,” he added.
Read more about the team’s excited response and Webb’s thrilling milestone here.
See Webb’s first view of space!
NASA has unveiled Webb’s first image. The photo, as seen above, shows a star called HD 84406 as seen through each of the observatory’s 18 golden mirror segments as scientists continue to work to align the mirror to produce a single, ultra-crisp image of the universe.
The agency also posted a video sharing the story behind the image:
But that’s not all the excitement for today! NASA has also released an annotated version of the same image, plus a “selfie” taken by the observatory of its own golden mirror. See those images and read more here>
And don’t forget to listen to NASA scientists talk about the new images live right now (11 a.m. EST/1600 GMT)! You can listen here at Space.com.
First Webb images available tomorrow, NASA says
NASA will release some of the first images taken by the James Webb Space Telescope on Friday (Feb. 11) at 10:30 a.m. EST (1530 GMT), according to an agency update (opens in new tab). While these images are an important milestone in the observatory’s commissioning, don’t get your hopes up for the next great view of the universe: These are images taken during the mirror alignment process and are strictly utilitarian.
In addition, NASA will offer an update on its progress aligning the 18 mirror segments of Webb’s massive primary reflector. The teleconference will begin at 11 a.m. EST (1400 GMT) and will be available to listen to on NASA TV (opens in new tab) or here at Space.com.
Speakers will include:
- Lee Feinberg, Webb optical telescope element manager, NASA’s Goddard Space Flight Center in Greenbelt, Maryland
- Marshall Perrin, Webb deputy telescope scientist, Space Telescope Science Institute in Baltimore
- Marcia Rieke, principal investigator for the NIRCam instrument and regents professor of astronomy, University of Arizona in Tucson
Webb is painted black – but why?
NASA’s James Webb Space Telescope is finally at its home in space where it’s preparing to observe the cosmos. But to do this, it has to stay ultra-cold. (Webb’s “cool side” is minus 388 degrees Fahrenheit (minus 233 degrees Celsius).)
Webb observes infrared light, aka heat, which means that to ensure that observations aren’t affected by any additional warmth the scope has to stay super cold. To keep Webb cold enough, the mission team painted its radiator (which helps to radiate heat away from the telescope) and components an ultra-black color.
Read more about Webb’s paint job and why it has to stay so cold here.
“First light” images coming soon
NASA could be releasing the first images from the James Webb Space Telescope in the next few days, NASA’s Webb program director Greg Robinson said in an agency town hall meeting today (Feb. 8). But don’t expect these first images to be pretty.
“So the beautiful, very clear images that we expect to see, you’ll see those in the summer sometime approximately six months after launch,” Robinson said. “Sometime next few days, you will see some of the first images that are not so clear … the purpose of those is to align the mirrors and make sure the entire system is working,” he added. “We are in that process right now. We just recently started it. So stay tuned over the next few days on those.”
Telescope alignment begins
The James Webb Space Telescope mission team has begun the three-month process of aligning the telescope, NASA officials announced today (Feb. 3).
“This milestone marks the first of many steps to capture images that are at first unfocused and use them to slowly fine-tune the telescope,” NASA officials wrote in an update today (opens in new tab). “This is the very beginning of the process, but so far the initial results match expectations and simulations.”
Read the full story: Alignment of James Webb Space Telescope begins
James Webb Space Telescope’s exoplanet plan, instruments on
NASA flight controllers are have switched on the four main instruments aboard the James Webb Space Telescope as they prepare to snap the first images of a target star that will be used to align the observatory’s 18-segment main mirror.
The instrument activation began last week. Here’s our full report from senior writer Tereza Pultarova.
Meanwhile, with Webb’s commissioning underway, scientists are now eyeing a future of amazing astronomy with the huge space observatory. One scientist, the Ph.D. candidate Louis-Philippe Coulombe of the University of Montreal, wrote in an op-ed that he is eager to see how Webb will help map the atmosphere of exoplanets, something the observatory should be able to do better than any space telescope to date.
James Webb Space Telescope waking up
The James Webb Space Telescope is beginning to wake up.
In a town hall press conference on Friday (Jan. 28), scientists with NASA’s Webb Space Telescope mission outlined the work so far to commission the observatory at its new home at the Earth-sun Lagrange point 2. During that virtual briefing, Webb scientists outlined the activation sequence for Webb’s main instruments, as well as the months-long mirror alignment and focusing work that is underway now.
Read our full story from Elizabeth Howell on Webb’s commissioning work from the briefing.
Meet Webb’s 1st target star: HD 84406
Scientists with NASA’s James Webb Space Telescope have picked the first star they will aim at with the new observatory and it’s in a very familiar place.
The star, called HD 84406, is located in the constellation Ursa Major, the Big Bear, which is home to a star pattern you may know better as the Big Dipper.
Webb scientists will use the star to focus each of the 18 mirror segments of Webb’s primary mirror. HD 84406 is a sun-light star about 260 light-years from Earth, and may need binoculars to see clearly.
Here’s our full story on HD 84406, the first target of the James Webb Space Telecope.
Also this week, Bill Ochs, NASA’s Webb telescope project manager, thanked the mission team for its amazing work and dedication to get the observatory to its L2 observing spot. Ochs quoted Jimmy Buffett as he hailed the team, changing some key lyrics.
According to an emailed statement from the Canadian Space Agency (CSA), Webb will begin turning on its science instruments today (Jan. 28). That will include the Fine Guidance Sensor, which will guide the observatory’s mirrors through the delicate alignment process to turn 18 small individual views into one massive view of the universe.
In the meantime, consider reading this op-ed from Thomas Zurbuchen, NASA’s associate administrator for science, celebrating the vast team behind the James Webb Space Telescope.
“We did it. We did it, and you can see that speck of light in the sky because of an incredible team with extraordinary tenacity,” Zurbuchen wrote. Read more>
Scientists relieved (and thrilled) after Webb’s trek
With the James Webb Space Telescope now at its final destination, scientists can let out a deep sigh of relief. After just over a month in space (and decades in development), Webb is now at its observing site.
“We’re a month in, and the baby hasn’t even opened its eyes yet. But that’s the science that we’re looking forward to,” Jane Rigby, Webb operations project manager at NASA’s Goddard Space Flight Center, said during a media teleconference on Monday.
You can read Rigby’s reaction and those of her Webb telescope colleagues in this update from today’s teleconference by contributing writer Elizabeth Howell.
Space.com Senior Writer Chelsea Gohd has this account of Webb’s arrival at L2 with comments from NASA chief Bill Nelson and others.
The James Webb Space Telescope is “home”
Today (Jan. 24), the James Webb Space Telescope arrived in orbit around L2, the second sun-Earth Lagrange point, its final destination after a long almost million-mile (1.5 million kilometers) journey from Earth.
To learn more about Webb’s arrival at L2, check out this article on Space.com here.
Webb arrives at L2!
The James Webb Space Telescope has arrived!
Webb has completed the mid-course correction burn (MCC2), an insertion burn that has guided it into its orbit around its final home in space, NASA announced in a blog post today (opens in new tab) (Jan. 24).
Beginning at 2 p.m. EST (1900 GMT), the space telescope fired its onboard thrusters for about five minutes (297 seconds) to complete this burn maneuver. The burn added just about 2.6 miles per hour (1.6 meters per second) (a walking pace, NASA noted), to Webb’s speed as the craft sailed into a halo orbit around its destination: L2, the second sun-Earth Lagrange point.
🏠 Home, home on Lagrange! We successfully completed our burn to start #NASAWebb on its orbit of the 2nd Lagrange point (L2), about a million miles (1.5 million km) from Earth. It will orbit the Sun, in line with Earth, as it orbits L2. https://t.co/bsIU3vccAj #UnfoldTheUniverse pic.twitter.com/WDhuANEP5hJanuary 24, 2022
L2, which lies just about a million miles (1.5 million kilometers) from Earth opposite the sun, is a gravitationally stable point that Webb will orbit as it works. Webb will spend the next few weeks in its new home cooling down before taking about five months to prepare its science instruments to get to work.
“Webb, welcome home!” NASA Administrator Bill Nelson said in the blog post. “Congratulations to the team for all of their hard work ensuring Webb’s safe arrival at L2 today. We’re one step closer to uncovering the mysteries of the universe. And I can’t wait to see Webb’s first new views of the universe this summer!”
Join NASA live at 3 p.m. EST (2000 GMT) here (opens in new tab) to learn more about the successful arrival and what’s next for Webb.
Insertion burn starting!
The James Webb Space Telescope has begun its mid-course correction burn (MCC2), the insertion burn that will ease it into its halo orbit around its ultimate home in space: L2, the second Lagrange point.
The #NASAWebb L2 Mid Course Correction Burn (MCC2) is ongoing: https://t.co/xpsH2rVmMX#UnfoldTheUniverse pic.twitter.com/8Yi2q9Mi8eJanuary 24, 2022
Lagrange points are gravitationally stable points in space, and L2 is located almost a million miles (1.5 million kilometers) away from Earth on the opposite side of the sun. This vantage point will help Webb to stay cold, which is crucial for its science instruments to work as planned.
Join NASA experts LIVE at 3 p.m. EST (2000 GMT) to hear about Webb’s progress and new home at L2.
About to begin insertion burn!
Webb is about to fire its thrusters to get to its ultimate destination!
Today (Jan. 24), the James Webb Space Telescope makes its arrival at its new home in space, in orbit around L2, the second sun-Earth Lagrange point which lies on the opposite side of Earth as the sun.
To get into orbit around L2, Webb is beginning what is known as the mid-course correction burn (MCC2), an insertion burn that will ease the space telescope into its operating orbit, a halo orbit, around L2.
Webb will begin MCC2 at 2 p.m. EST (1900 GMT) and, at 3 p.m. EST (2000 GMT), NASA officials will be updating the public and answering questions live right here.
Today is the day!
Nearly a month after its stunning Christmas Day launch, NASA’s James Webb Space Telescope is due to arrive in orbit around L2 today (Jan. 24).
At about 2 p.m. EST (1900 GMT), the mission team will direct the observatory to fire its thrusters for about five minutes, completing the long journey of nearly 1 million miles (1.5 million kilometers).
NASA will not be broadcasting the burn live, but scientists will be talking about what’s next for the observatory during a 3 p.m. EST (2000 GMT) broadcast and the agency will hold a media teleconference at 4 p.m. EST (2100 GMT) as well. You can watch both events live on Space.com.
Although arrival in orbit marks the last major milestone in the observatory’s deployment, the telescope isn’t quite ready to do science. The mission team still needs to precisely align the 18 golden mirror segments into one vast reflector and to calibrate the observatory’s instruments.
NASA has said to expect the James Webb Space Telescope to begin science operations this summer.
James Webb Space Telescope 1 day from L2
NASA’s James Webb Space Telescope is one day away from arriving at its final destination for its ambitious science mission: a gravitationally stable point in space known as the Earth-sun Lagrange point 2, or L2.
As of 8 a.m. EST (1300 GMT), the Webb Space Telescope was about 17,310 miles (27,854 kilometers) away from the L2 location, and about 893,897 miles (1,438,484 km) from the Earth. The L2 location is nearly 1 million miles from Earth on the opposite side of the Earth from the sun.
Webb is expected to enter orbit around the L2 point on Monday, Jan. 24. To do so, it will fire its thrusters at 2 p.m. EST (1900 GMT) on Monday for a few minutes to push it the final distance into L2 orbit.
NASA is expected to host a live webcast of the L2 arrival insertion burn and follow it up with a NASA Science Live program to discuss the event at 3 p.m. EST (2000 GMT). At 4 p.m. EST (2100 GMT), NASA will hold a press teleconference on the event to discuss the next steps for the space telescope.
L2 on Monday
NASA’s James Webb Space Telescope is just a few days away from its arrival at its home in space: L2, or the second Lagrange point, gravitationally stable points in space. L2 is positioned on the side of Earth opposite the sun.
While NASA had previously expected Webb to arrive at L2 on Jan. 23, 29 days after its Dec. 25 launch, Webb is now expected to begin its mid-course correction burn (MCCB), or insertion burn, into an orbit around L2 on Monday (Jan. 24).
You’ll be able to watch a live broadcast with scientists and engineers operating the space telescope on Monday at 3 p.m. EST (2000 GMT).
Next stop, L2.
Webb’s next major milestone will be its arrival in orbit around a point in space called the Earth-sun Lagrange point 2, or L2. This video explains where L2 is and why the observatory will camp out in orbit around it.
Mirror deployment is complete
Just in from the @NASAWebb team: All 18 primary mirror segments and the secondary mirror are now fully deployed!Congratulations to the teams that have been working tirelessly since launch to get to this point. Soon, Webb will arrive at its new home, L2!#unfoldtheuniverse pic.twitter.com/QsIyr5AWiiJanuary 19, 2022
The 18 primary mirror segments of the James Webb Space Telescope are fully deployed, according to a tweet from NASA Administrator Bill Nelson. The observatory has one deployment milestone outstanding, a final course correction burn. Read more>
Fast forward to Webb’s first look
NASA is continuing to adjust the individual mirror segments of the James Webb Space Telescope as the observatory continues its trek to orbit nearly 1 million miles (1.5 million kilometers) away from Earth. In the meantime, we’re looking ahead to the big moment: What will the observatory look at first? Read more>
Time to adjust those mirrors
NASA has confirmed that the team behind the James Webb Space Telescope have begun the process of aligning the observatory’s mirrors, which were stowed for launch. The preliminary adjustments will take about 10 days, according to a mission timeline, although NASA expects to spend about three months to completely align the panels into a working telescope. Read more>
Onto Webb’s mirror segments
According to a NASA timeline (opens in new tab), the team behind the James Webb Space Telescope will likely begin moving the 18 individual segments of the observatory’s hexagonal golden mirror out of their launch configurations on Wednesday (Jan. 12).
This process is slow and finicky, and is expected to take about 10 days. Each of the 18 primary mirror segments is held in place by seven different actuators that can adjust their position and curvature super precisely. But even once this process is complete, the observatory team will need to spend about three more months getting the honeycomb of mirrors to work together to produce one sharp image.
Webb has been in space for 18 days now and is more than 82% of the way to its final destination. The observatory will orbit a point called the Earth-sun Lagrange point 2, or L2, which is located nearly 1 million miles (1.5 million kilometers) away from Earth on the side opposite the sun. The observatory has covered more than 740,000 miles (1.2 million km) and has 160,000 miles (250,000 km) more to go.
You can track the telescope’s (opens in new tab) location, temperature and deployment via NASA.
Webb keeps trekking out to space
NASA has again delayed beginning work on aligning the individual mirror segments of the James Webb Space Telescope, according to an agency timeline (opens in new tab), with that project now scheduled to begin Wednesday (Jan. 12). The process will take several days and moves the 18 individual hexagons of the golden primary mirror out of their launch configuration.
In the meantime, Webb continues its long journey out to Earth-sun Lagrange point 2, or L2. The observatory is currently 80% of the way to L2 and has traveled nearly 725,000 miles (1.16 million kilometers) away from Earth. To follow Webb’s journey, consult NASA’s tracking website (opens in new tab) for the observatory, which also tracks the deployment process.
Webb work continues
Adjustments to the 18 golden mirror segments of Webb’s primary mirror are due to begin tomorrow, Jan. 11, according to the deployment timeline provided by NASA (opens in new tab). That process is expected to take several days and marks the observatory’s transition from deployment into commissioning.
Meanwhile, the observatory continues its trek out to its station orbiting Earth-sun Lagrange point 2, or L2, which is located about 1 million miles (1.5 million kilometers) away from Earth on the side opposite the sun. As of today (Jan. 10), the telescope is more than 78% of the way to orbit, having traveled more than 700,000 miles (1.1 million km) from Earth, according to NASA’s observatory tracker (opens in new tab).
Mirror alignment to begin for Webb Space Telescope
With the James Webb Space Telescope now fully deployed, work is expected to begin today to start aligning the 18 individual mirrors that make up the observatory’s primary mirror. It is not a fast process.
“This operation is a multi-day multi-step activity to activate and move each of its 18 primary mirror segments (which are adjustable) out of their launch configuration, NASA wrote in a deployment guide. “The primary mirror segments and secondary mirror are moved by six actuators that are attached to the back of each mirror piece. The primary mirror segments also have an additional actuator at its center that adjusts its curvature. The telescope’s tertiary mirror remains stationary.”
The primary mirror is Webb’s main light collection surface. It will reflect light to the tertiary mirror located on booms in front of the telescope, which then bounces the light into Webb’s instruments.
Each of the 18 segments of the primary mirror is plated in a shiny, but ultra thin, layer of gold. If left in launch position, they would act as individual telescopes with images that would be fuzzy and unclear. Once aligned, the mirror segments will act as one giant mirror 21.3 feet (6.5 meters) across, the largest ever in space.
NASA has estimated that it could take up to 120 days after launch for Webb’s mirror alignment work to be complete. The first photos from Webb are not expected until about five months after launch once commissioning ends. — Tariq Malik
Here’s a look at how Webb’s focusing works:
James Webb Space Telescope deployment success
An elated mission team for NASA’s James Webb Space Telescope confirmed that the space observatory is in great shape after a deployment phase that was 100% successful.
“It is a fully deployed telescope ready to perform fantastic science to expand our knowledge,” said John Durning, Webb Deputy Project Manager of NASA Goddard.
Up next for the Webb team is a five-month commissioning phase to calibrate the telescope’s optics and adjust its mirrors. Webb is currently making its way to its final observing site nearly 1 million miles (1.6 km) from Earth and is due to arrive around Jan. 23.
To enter orbit around its Lagrange 2 point, Webb will have to perform a short maneuver, but it is expected to go well.
NASA Webb Space Telescope press conference underway
NASA’s post-deployment press conference is underway now and you can watch it live in the video window at the top of this page.
NASA is holding two panels, one on the deployment’s success and the other on what’s next for the Webb Space Telescope.
Here’s a rundown of the speakers for the briefing:
Panel on Webb Space Telescope deployment success
Bill Ochs, Webb Project Manager, NASA Goddard
Mike Menzel, Mission Systems Engineer, NASA Goddard
Scott Willoughby, Vice President and Program Manager, Webb, Northrop Grumman
Vince Heeg, Deputy Program Manager, Northrop Grumman
Panel on what’s next for James Webb Space Telescope
John Durning, Webb Deputy Project Manager, NASA Goddard
Lee Feinberg, Webb Optical Telescope Element Manager, NASA Goddard
Jane Rigby, Webb Operations Project Scientist, NASA Goddard
Heidi Hammel, Vice President for Science, Space Telescope Science Institute
Success! Webb Space Telescope primary mirror latched
Congratulations, @NASAWebb! You are fully deployed! 🥳Stay tuned over the coming months as the space telescope reaches its destination of Lagrange point 2 and prepares to #UnfoldTheUniverse: pic.twitter.com/qg6jmVRCsHJanuary 8, 2022
James Webb Space Telescope mission engineers confirmed that the observatory’s starboard primary mirror wing successfully latched into place at 1:17 p.m. EST (1817 GMT), marking an end to a two-week process that was NASA’s most-complicated deployment in space telescope history.
Cheers erupted at Webb’s mission operations center at the Space Telescope Science Institute in Baltimore, Maryland, as the mission team now prepares for an arduous three-month process to align and calibrate the $10 billion space telescope.
“Today, NASA achieved another engineering milestone decades in the making!” NASA Administrator Bill Nelson said on Twitter. “While the journey is not complete, I join the Webb team in breathing a little easier and imagining the future breakthroughs bound to inspire the world.”
NASA will hold a press conference at 2:30 p.m. EST (1930 GMT) for today’s successful deployment. You’ll be able to watch that live here at start time.
Latching underway for Webb telescope mirror
James Webb Space Telescope engineers have passed the halfway mark in latching the observatory’s starboard mirror wing in place.
The latching process began shortly after 10:30 a.m. EST (1530 GMT) and was expected to take around two hours to complete.
Webb Space Telescope mirror fully deployed!
It’s official, the primary mirror of NASA’s James Webb Space Telescope is completely deployed, the final step of its unprecedented two-week deployment phase that began with a Dec. 25 launch.
“I just feel this kind of glow in my chest right now just seeing that mirror deployed all together,” NASA scientist Michelle Thaller said in a live webcast as the Webb mission team applauded and shared high-fives.
Webb space telescope starboard mirror in motion
The Webb Space Telescope’s mission operations team has commanded Webb to deploy its starboard mirror wing.
It should take 4 to 5 minutes for the mirror segment to swing into place, after which it will take a few hours to latch into place.
Launch locks released from Webb mirror
The four launch locks securing the Webb Space Telescope’s starboard mirror wing in place have successfully been unlocked, freeing the mirror segment for its final move.
A series of motors successfully worked to unlock the launch locks. They were the final critical movies of 178 mechanism firings that were vital to go smoothly for Webb’s deployment over the last two weeks, NASA says. Those actions were non-redundant, if one failed it would have doomed the Webb Space Telescope.
“178 out of 178, congratulations,” Webb’s Mission Operations Manager just said.
The mirror segment is expected to begin slowly moving soon, with major movement to begin in about 20 minutes. Once in place, it will take about two hours to latch it securely in place. — Tariq Malik
Final mirror unfolding begins for Webb Space Telescope
NASA has begun unfolding the final mirror wing for the James Webb Space Telescope. You can watch it in the live video feed at the top of this page.
Telescope controllers are working to send commands that will remove the launch locks on Webb’s starboard mirror wing. Today’s mirror unfolding will swing three final mirror segments into place to complete the 18-segment primary mirror deployment, the final step for Webb’s two-week deployment phase.
Here’s a closer look at the primary mirror of James Webb Space Telescope
Webb Space Telescope final deployment underway
NASA’s James Webb Space Telescope mirror deployment webcast is underway. You can watch it above here hosted by NASA scientist Michelle Thaller.
NASA to webcast Webb final mirror deployment
Update for 9 a.m. EST: NASA’s live webcast appears delayed. Once it begins, it will appear on this page.
It’s a major day for the James Webb Space Telescope. Two weeks after its Dec. 25 launch, The Webb space telescope is scheduled to unfold its final mirror segment today, Jan. 8, today.
NASA will webcast the deployment of the Webb’s starboard primary mirror segment live, with a livestream beginning no earlier than 9 a.m. EST (1400 GMT). You’ll be able to watch that live on this page once it begins.
Today’s mirror deployment will use motors to swing Webb’s starboard primary mirror wing, which consists of three mirror segments, into its final position. It will then be latched into place.
“Upon completion, Webb will have concluded its major deployment sequence,” NASA officials wrote in an update on Friday (opens in new tab) after Webb’s port mirror wing was deployed.
After today’s mirror deployment, NASA will hold a press conference to begin no earlier than 1:30 p.m. EST ( 1730 GMT). — Tariq Malik
Live webcast delayed to Saturday
The Virtual Telescope Project’s live webcast of the James Webb Space Telescope in deep space has been postponed until Saturday (Jan. 8), because clouds above the observatory Italy did not clear up in time to see it today. The webcast is scheduled to begin at 4:30 p.m. EST (2130 GMT).
The weather forecast for Saturday’s observation looks more promising, Gianluca Masi of the Virtual Telescope Project told Space.com in an email.
Virtual Telescope Project JWST webcast delayed
Astrophysicist Gianluca Masi of the Virtual Telescope Project near Rome, Italy will broadcast live views of the distant James Webb Space Telescope today, beginning at 5:30 p.m. EST (2230 GMT). The webcast was originally scheduled to begin an hour earlier, but clouds are currently blocking the view.
You can tune in live in the window above, courtesy of the Virtual Telescope Project.
1st mirror wing deployed
The James Webb Space Telescope unfolded the first of two wing segments on its hexagonal gold-coated primary mirror on Friday (Jan. 7). NASA received confirmation of the successful deployment at approximately 2:11 p.m. EST (1911 GMT), agency officials wrote in a blog post (opens in new tab).
Nope, we’re not just winging it! But we did successfully deploy and latch the first of our two primary mirror wings. 😎These side panels, folded back for launch, each hold 3 of Webb’s 18 mirror segments. Next up: our final wing! https://t.co/xnaWZXYiSx #UnfoldTheUniverse pic.twitter.com/mBQ0S7eB2wJanuary 7, 2022
Webb’s main mirror deployment has begun!
The James Webb Space Telescope has begun unfolding the left side panel of its golden primary mirror, according to a NASA statement (opens in new tab) published just before 9:30 a.m. EST (1430 GMT). The panel holds three of the hexagonal mirror segments the observatory uses to catch light.
During the deployment, team members will unlatch the wing from its stored position, then motors will unfold the panel in a process expected to take about five minutes. Then, the team will spend about two hours latching the panel into place, according to the statement.
The team is expected to repeat the process tomorrow (Jan. 8) on the right side of the observatory, which will mark the last major unfolding from the spacecraft’s launch position. That event will be livestreamed beginning around 9 a.m. EST (1400 GMT), NASA has stated.
Webb main mirror deployment begins today
The James Webb Space Telescope will begin its final major unfolding events today with the first of two primary mirror deployments.
Today, Webb is expected to unfold and secure its port primary mirror wing, which contains three of the space telescope’s 18 hexagon-shaped mirror segments.
“Webb’s final series of major deployments is planned to start tomorrow, Jan. 7, with the rotation into position of the first of two primary mirror wings,” NASA wrote in an update on Jan. 6 (opens in new tab). “The second primary mirror wing – Webb’s final major spacecraft deployment – is planned for Saturday, Jan. 8.”
Webb’s two primary mirror wings, port and starboard, each have three mirror segments. They were folded back behind the central mirror face during launch in order to fit inside the payload fairing of Webb’s Ariane 5 rocket.
In other Webb news, the European Space Agency released a stunning HD video of the James Webb Space Telescope captured just after it separated from its Ariane 5 rocket. You can watch that video of Webb here. It is the last view of the space telescope we’ll ever see.
Why is it the last view? The James Webb Space Telescope doesn’t have onboard cameras.
Webb Mirror deployment webcast update
This is an update to note that NASA’s webcast of the James Webb Space Telescope’s mirror deployment will actually occur on Saturday, Jan. 8, at a time still to be determined based on NASA’s latest live broadcast schedule (opens in new tab).
Webb’s flight controllers plan to deploy the the telescope’s aft radiator as soon as today before proceeding with the port and starboard mirror deployments on Friday and Saturday. Sorry for any confusion, space fans! — Tariq Malik
James Webb Space Telescope to deploy port mirror wing
The James Webb Space Telescope is expected to begin unfolding its primary mirror today, Jan. 6, starting with the port side.
In what could be a two-day process, Webb will unfold first the port side and then the starboard side wings of its 18-segment primary mirror, which is made up of shiny gold hexagons. There are three mirror segments on each wing.
Each of the wings were folded for launch in order to fit inside the payload fairing of Webb’s Ariane 5 rocket.
While the mirror unfolding process is scheduled to take two days, it could occur faster. Webb’s mission operations team has been running ahead of schedule for several key steps.
NASA will webcast today’s Webb mirror deployment on NASA TV. A time has not been released for the webcast’s start. Once we have more information, we’ll share that here. — Tariq Malik
James Webb Space Telescope secondary mirror latched securely
The secondary mirror of NASA’s James Webb Space Telescope is now securely latched into place, marking a successful end to today’s deployment step. NASA’s webcast has ended. You can read our full story by senior writer Tereza Pultarova here.
Deploying the mirror is the latest critical step for the Webb space telescope. The secondary mirror will focus light from the main mirror into the observatory’s optics.
Over the next few days, Webb will deploy its aft radiator, followed by folding out the two side segments, or wings, of its main mirror. Those steps will mark the final major deployment stages of the telescope.
Engineers will still have to move each of the 18 primary mirror segments out of their launch configuration so that they can be calibrated for observations. Once that is complete (slated for 15 days after launch), the next major step will be Webb’s arrival into orbit around its L2 point.
Webb space telescope secondary mirror deployed
NASA reports that the secondary mirror of the James Webb Space Telescope has successfully unfolded and is now in position.
Mission operations controllers are now working to drive latches into place to secure the mirror in its deployed configuration. Here’s a look of how the operation went:
NASA Webb mirror deployment webcast begins
NASA’s live webcast of the James Webb Space Telescope’s secondary mirror deployment has begun! You can watch live in the window above.
NASA to Webbcast secondary tescope mirror deployment
Update: NASA’s webcast will now begin at 10:20 a.m. EST (1520 GMT).
NASA’s James Webb Space Telescope will deploy its secondary mirror today and you’ll be able to follow the milestone live in a webcast today beginning at 10:20 a.m. EST (1520 GMT).
During this step, Webb will unfold a series of booms that hold the secondary mirror out in front of the observatory’s main multi-segmented mirror. You’ll be able to watch the live webcast on this page once it begins, and you can watch it directly from NASA here (opens in new tab).
“Webb’s secondary mirror is at the end of the Secondary Mirror Support Structure (SMSS),” NASA wrote in a deployment description. “As it is deployed, its long booms will swing the secondary mirror out in front of the primary mirror. The secondary mirror plays an important role in reflecting the light from the primary mirror to where the instruments sit, behind the primary mirror.”
On Monday, Webb completed its huge sunshield deployment. Here’s a look at what’s ahead this week for the James Webb Space Telescope this week.
Listen to NASA’s sunshield briefing
Today’s live broadcast of the Webb telescope sunshield and deployments media teleconference did not air live on NASA TV as the agency said it would — but you can now listen to a recording of the briefing on YouTube (opens in new tab).
NASA briefing coming soon…
NASA officials will hold a media teleconference at 12:45 p.m EST (1745 GMT) today to discuss the recently completed deployment of the James Webb Space Telescope’s sunshield and go over next steps for the observatory.
You can listen to the teleconference live in the window above, courtesy of NASA TV, or directly via nasa.gov/live (opens in new tab).
James Webb Space Telescope sunshield tensioning complete!
NASA has just confirmed that the fifth and final layer of the James Webb Space Telescope’s heat shield has been successfully tensioned, marking the end of the sunshield deployment work that began last week.
“This is an historic day,” NASA scientist Michelle Thaller said during a live webcast. “The first major phase of the deployment of the sunshield has been compete.”
Our wrap story on the event will be posted shortly.
NASA webcast for Webb sunshield tensioning
Update: NASA’s Webb sunshield tensioning webcast is under way. Watch live above for the critical milestone for the James Webb Space Telescope.
It’s Day 2 of sunshield tensioning for NASA’s James Webb Space Telescope and the space agency will webcast live views from Webb’s mission operations center in Baltimore, Maryland today starting at 9:30 a.m. EST (1430 GMT). You’ll be able to watch that live here in the window above at start time.
NASA did not state how long the webcast will last, but the agency does have another event scheduled for 11:25 a.m. EST from the International Space Station, so it likely won’t last beyond that.
Webb’s sunshield tightening is the final step in the intricate unfurling of the space telescope’s tennis court-sized shield to protect it from sunlight and keep it cool enough for science. It involves using a series of motors to position and tighten the five ultra-thin layers of Webb’s reflective sunshield.
The process began on Monday, Jan. 3, with Layer 1 tightening and was expected to end as soon as Wednesday, Jan. 5. However, NASA is way ahead of schedule. As of late Monday, three of the five sunshield layers have been successfully tightened, the agency said in an update on Twitter (opens in new tab).
The layers start coming and they don’t stop coming…Layers 2 and 3 are now complete! Tensioning for the final two layers of Webb’s 5-layer sunshield is planned for tomorrow. More: https://t.co/rD9IOD9gX4 #UnfoldTheUniverse pic.twitter.com/BaQKwd2MuOJanuary 4, 2022
Webb space telescope in good health, tensioning beginning
NASA’s James Webb Space Telescope is in good health and will begin tensioning its huge sunshield today, its mission team said today.
In a media teleconference, NASA officials said Webb will begin tightening the tension on the 1st layer of the five-layer sunshield on Webb today after two days of rest and power system optimization.
Two issues occurred over the New Year’s Day holiday weekend.
First, Webb’s solar arrays were not generating as much power as they could due to their factory settings. At no point was the space telescope in need of power, but NASA rebalanced the arrays so that they can now work at their peak efficiency.
Second, the motors used to tension Webb’s sunshield were not staying cool enough as flight controllers preferred. They commanded Webb to change its orientation in space in a way that will keep its motors cooler during the deployment phase.
With both of those fixes in, Webb appears to be doing well in its deployment.
The tensioning process for Webb’s sunshield should take at least three days, NASA officials said.
NASA to hold press conference on Webb deployment
NASA will hold a media teleconference at 11:30 a.m. EST (1630 GMT) today, Jan. 3, and you can listen to it live here, courtesy of NASA TV. You can also watch directly from NASA here (opens in new tab).
This teleconference will update the public on the James Webb Space Telescope’s deployment after its sunshield was deployed on Dec. 31.
NASA paused deployment activities on Saturday, Jan. 1, to give its team a rest. The team then spent Sunday studying Webb’s power systems before proceeding with the final steps for sunshield deployment.
James Webb Space Telescope tension could begin today
After a day of delay, NASA James Webb Space Telescope flight controllers are expected to begin the sunshield tightening process on the new space observatory today, Jan. 3.
The process, which could take at least two days, was initially slated to begin yesterday, but NASA opted to stand down and instead study Webb’s power systems to make sure they were working properly after a week in space.
The sunshield tightening process involves activating a series of motors on Webb that will separate, and then tighten, the five layers of the space telescope’s gossamer sunshield, which is blocks out sunlight from the infrared observatory’s sensitive instruments so it can better study the universe. — Tariq Malik
NASA delays Webb sunshield tensioning
NASA flight controllers have delayed today’s planned tensioning of the James Webb Space Telescope’s sunshield in order to work on the observatory’s power systems.
“This will ensure Webb is in prime condition to begin the next major deployment step in its unfolding process,” NASA officials wrote in an update today (opens in new tab) (Jan. 2).
The sunshield tensioning process will now begin no earlier than Monday, Jan. 3, and is expected to take at least two days. Flight controllers made the decision earlier today in order to optimize the power systems on the Webb space telescope.
“Specifically, the team is analyzing how the power subsystem is operating now that several of the major deployments have been completed,” NASA wrote in the update. “Simultaneously, the deployments team is working to make sure motors that are key to the tensioning process are at the optimal temperatures prior to beginning that operation.”
Webb’s step-by-step deployment process is designed in such a way that it can be stopped and started along the way as required, according to NASA officials. The flight control team wants to use some extra time to better understand how Webb is behaving in space, and how it is differing from simulations based on computer testing on the ground.
“Nothing we can learn from simulations on the ground is as good as analyzing the observatory when it’s up and running,” said Bill Ochs, NASA’s Webb project manager at the Goddard Space Flight Center in Greenbelt, Maryland, said in the update. “Now is the time to take the opportunity to learn everything we can about its baseline operations. Then we will take the next steps.” — Tariq Malik
Webb ratchets up the tension today
It’s time to raise the tension on NASA’s James Webb Space Telescope.
After taking New Year’s Day off on Saturday to rest up after a long Friday night unfolding Webb’s massive sunshield, the mission team aims to begin tensioning the shield’s five layers today to lock them in place.
It should take at least two full days to lock Webb’s sunshield in place, which marks the final step in its weeklong deployment process. The process involves Webb separating the five layers of its sunshield, which unfolded in a single group and then tensioning them so they are tightly secured for the space telescope’s lifetime.
NASA expects to complete the sunshield tightening step on Monday, Jan. 3, and will then hold a press teleconference to update the public on the space telescope’s status. – Tariq Malik
Taking a rest day
The team overseeing the deployment of the James Webb Space Telescope are taking today (Jan. 1) off, according to a NASA statement. Yesterday’s procedure, deploying the two booms that support the width of the observatory’s massive sunshield, ran later into the day than personnel had hoped. And the next step is even more daunting: a two-day process of separating the five delicate layers of the vast sunshield.
That work will begin tomorrow (Jan. 2), the statement noted, and is expected to take two days to complete. Read more>
James Webb unfurls its sunshield!
The James Webb Space Telescope successfully unfurled its massive sunshield on Friday (Dec. 31), notching a huge milestone in its long and complex deployment campaign. Read our full story about it here.
The sunshield, which will help keep Webb’s optics and instruments cool enough to detect faint heat signals from the early universe, unfolded via two “mid-booms,” which were extended over two roughly three-hour stretches on Friday.
The boom extension activities were delayed slightly while Webb team members checked to make sure the sunshield’s protective cover had fully rolled up as needed. But everything worked out just fine.
“Today is an example of why we continue to say that we don’t think our deployment schedule might change, but that we expect it to change,” Keith Parrish, Webb observatory manager at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, said in a blog post update Friday night (opens in new tab).
“The team did what we had rehearsed for this kind of situation — stop, assess and move forward methodically with a plan,” Parrish said. “We still have a long way to go with this whole deployment process.”
Next up is tensioning of the sunshield’s five layers, which could be complete as early as Sunday (Jan. 2). After that, the Webb team will shift their focus to mirror deployment.
Sunshield halfway unfurled!
The James Webb Space Telescope has successfully deployed its sunshield port mid-boom, unfurling half of the huge membranous structure.
“The deployment of the 5 telescoping segments of the mid-boom began around 1:30pm ET and reached full deployment at 4:49 pm,” mission team members said via Twitter today (opens in new tab) (Dec. 31). “Webb’s deployment steps are all human-controlled, so the schedule can change. The team plans to deploy the starboard mid-boom tonight.”
There was indeed a schedule change today: The mid-boom deployments were supposed to happen earlier, but Webb’s handlers took extra time to make sure the sunshield’s protective cover had fully rolled up as planned, mission team members explained in another tweet (opens in new tab).
Sunshield deployment is one of the riskiest, most complex activities the $10 billion observatory will perform during its time in space. So keep your fingers crossed that everything goes well tonight and over the weekend, when the team plans to bring the deployed shield’s layers up to the proper tension.
James Webb Space Telescope to deploy sunshield booms
It’s a big day for the James Webb Space Telescope.
Today is the day the huge space observatory will deploy the two mid-booms on it port and starboard side that will extend its sunshield out to its full width. The port boom will be extended first, followed by the starboard boom. Motors will drive both events.
Each mid-boom will deploy with its five sunshield membrane layers attached. If it goes smoothly, Webb will spend the next two days tightening the tension of the sunshield so it’s not loose.
Wondering why it takes so many steps to deploy Webb’s sunshield? Our Senior Writer Mike Wall has the full story here today.
Webb deploys flab, removes sunshield covers
NASA’s James Webb Space Telescope successfully completed its two critical deployments for today, the space agency announced.
In back-to-back updates, NASA officials confirmed that the Webb space telescope successfully deployed its aft momentum flap and retracted the protective membrane covers on its gossamer sunshield, a major step in the weeklong work to unfurl the shield.
The membrane covers protected Webb’s sunshield, which will be as large as a tennis court when deployed, during launch. You can see an animation of how the cover retraction went in space above.
Here’s a close-up graphic below of the aft momentum flap, which is designed to steady Webb against the push of solar wind against its huge sunshield. — Tariq Malik
2 deployment steps for Webb telescope today
It’s been five days since NASA’s James Webb Space Telescope launched into space on the observatory has two steps planned for today to continue its ultra-complicated deployment.
Today, Webb is expected to unfold a aft momentum flap, a three-panel structure at the bottom rear of the telescope designed to offset some of the pressure from the solar wind on Webb’s massive sunshield. The flap should help Webb conserve fuel during its mission life as it limits the extra push on the telescope from the solar wind.
Later, Webb is expected to retract the sunshield membrane covers that have been protecting its thin sunshield layers since launch. The step will require a series of release devices to be activated that will then retract and roll up the membrane covers (two per sunshield pallet, fore and aft) to uncover the sunshield itself.
When deployed, the five-layer sunshield will be about the size of a tennis court. But there are 50 distinct steps to get it into place.
You can explore exactly how Webb is unfolding at NASA’s Deployment Explorer website here (opens in new tab). — Tariq Malik
JWST extends its Deployable Tower Assembly
The James Webb Space Telescope has successfully completed the deployment of the tower assembly that separates the two main halves of the spacecraft.
The observatory’s Deployable Tower Assembly took a little over 6.5 hours to extend, creating about 4 feet (1.2 meters) of space between the mirror assembly and the spacecraft’s bus, which houses its electronics and propulsion systems, NASA officials said in a statement (opens in new tab).
“This creates enough distance to allow the sensitive mirrors and instruments to cool down to the necessary temperatures to detect infrared light,” NASA said in the statement. “This gap will also provide room for the sunshield membranes to fully unfold.”
Correction: This post was updated to correct the distance of space created by the tower deployment, it is 4 feet, not 2 feet.
Next up: Deployable Tower Assembly
NASA’s James Webb Space Telescope has begun extending its Deployable Tower Assembly, according to an agency update (opens in new tab). The process, which began shortly after 9 a.m. EST (1400 GMT), will take at least six hours and creates space for the observatory’s sunshield to deploy.
Good news: Webb has plenty of fuel for years of science
According to a NASA update, the James Webb Space Telescope may have enough fuel to more than double its minimum lifetime thanks to the precision of its launch and the two trajectory corrections the spacecraft has made to date.
“The Webb team has analyzed its initial trajectory and determined the observatory should have enough propellant to allow support of science operations in orbit for significantly more than a 10-year science lifetime. (The minimum baseline for the mission is five years.)” agency officials wrote in an update (opens in new tab) posted Dec. 29.
However, NASA emphasized that it is not providing a new mission timeline for the long-awaited observatory. “Consequently, Webb will have much more than the baseline estimate of propellant — though many factors could ultimately affect Webb’s duration of operation,” officials wrote in the statement. Read more>
Webb’s sunshield unfolds some more
The James Webb Space Telescope has successfully completed deploying both pallet structures of its sunshield, notching another milestone in the five-day-long process of unfurling the massive sunshield.
After deploying the forward pallet earlier today, the aft pallet finished deploying at approximately 7:27 p.m. EST on Tuesday, Dec. 28 (0027 GMT on Dec. 29).
“While the actual motion to lower the forward pallet from its stowed to its deployed position took only 20 minutes, and the lowering of the aft pallet took only 18 minutes, the overall process took several hours for each because of the dozens of additional steps required,” NASA officials said in a statement (opens in new tab).
“These include closely monitoring structural temperatures, maneuvering the observatory with respect to the sun to provide optimal temperatures, turning on heaters to warm key components, activating release mechanisms, configuring electronics and software, and ultimately latching the pallets into place.”
Sunshield deployment has begun!
The James Webb Space Telescope has begun deploying its massive sunshield, a vital component of the observatory. The spacecraft unfolded its Forward Unitized Pallet Structure, which supports the sunshield, on Tuesday (Dec. 28). Read more>
Webb has crossed the moon’s orbit
NASA’s James Webb Space Telescope is now farther from Earth than the moon’s orbit, according to an agency update posted late Monday (Dec. 27). The spacecraft also completed its second of three trajectory correction burns. Next up, the observatory will begin deploying its massive sunshield. Read more>
Webb telescope maneuver planned
It’s day three of NASA’s “29 days on the edge” for the James Webb Space Telescope and today’s main goal is to perform the second of three mid-course correction burns to refine Webb’s path to its new home at Lagrange point 2, or L2, nearly 1 million miles (1.6 million km) from Earth.
Latest story: James Webb Space Telescope successfully deploys antenna
Webb performed its first, and biggest, course correction burn on Saturday, Dec. 25, after launching into space. The third burn will occur on day 29 to enter its final orbit around the L2 point.
Here’s how NASA describes today’s planned burn on its deployment guide (opens in new tab):
“This burn fine-tunes Webb’s trajectory after launch. The duration of the burn will depend on Ariane 5 launcher performance.
“There are three mid-course correction (MCC) maneuvers: MCC-1a, MCC-1b, and MCC-2. This is the second. The first burn, MCC-1a, is the most important and the only other time-critical operation aside from solar array deployment during Webb’s commissioning period.
“The second, MCC-1b, is a shorter burn performed before the sunshield deployment is scheduled to start. The final maneuver, MCC-2, performed 29 days after launch, is designed to insert Webb into the optimum orbit around L2.
Antenna deployment successful
A day after launch, the James Webb Space Telescope continues to travel away from Earth and set itself up for observations in the months to come.
Beginning on Sunday (Dec. 26) at about 10 a.m. EST (1500 GMT), the spacecraft deployed and tested a key antenna in a process that took about one hour, according to a NASA statement (opens in new tab). The antenna will be responsible for twice-daily science data dumps to Earth.
In addition, the spacecraft’s temperature sensors and strain gauges began work overnight. The next stage in the telescope’s deployment, according to NASA (opens in new tab), will be a second course-correction burn scheduled to occur about two days after launch.
Crucial burn complete, NASA says
The James Webb Space Telescope successfully executed a vital burn to correct its trajectory, according to a NASA statement (opens in new tab). The burn began at 7:50 p.m. EST (0050 GMT) and lasted for 65 minutes, according to the agency. The maneuver also marked the last step of the mission’s deployment that needed to be executed at a specific time; from now on, mission personnel can adapt the deployment timeline as needed. Read more>
Congratulations @NASA and all who made today’s launch of the James Webb telescope possible. Webb is a shining example of the power of what we can accomplish when we dream big. We’ve always known that this project would be a risky endeavor, but with big risk comes big rewards.December 25, 2021
President Joe Biden offered his congratulations on the successful launch of the James Webb Space Telescope the evening of its flawless launch. “Congratulations @NASA and all who made today’s launch of the James Webb telescope possible,” Biden wrote in a tweet (opens in new tab). “Webb is a shining example of the power of what we can accomplish when we dream big. We’ve always known that this project would be a risky endeavor, but with big risk comes big rewards.”
Where is NASA’s James Webb Space Telescope?
It’s been just over 7 hours since NASA’s James Webb Space Telescope launched into space and the space telescope is currently more than 67,800 miles (109,110 kilometers) away and climbing as it makes its way toward its destination: Lagrange Point 2.
You can track the Webb space telescope with NASA’s Where is Webb website (opens in new tab) online, which uses real-time telemetry from the spacecraft to present a precise picture of where the space telescope is and at what stage its deployment is in.
It will take about 29 days for Webb to reach L2 nearly 1 million miles (1.6 million km) from Earth, and about six months before it will be ready to begin snapping images of the universe.
The next milestone for Webb will be a mid-course correction burn, a maneuver in deep space to fine-tune the space telescope on its path to L2.
‘It’s truly Christmas!’ NASA on JWST launch
NASA chief Bill Nelson called today’s successful launch of the James Webb Space Telescope a “good day for Earth” as NASA and its partners celebrate the successful beginning of a $10 billion mission.
Thomas Zurbuchen, NASA’s associate administrator for science missions, said it’s a Christmas to remember.
“What am amazing day,” Zurbuchen said. “It’s truly Christmas with all the presents and everything and we have a space mission.”
Post-launch press conference for JWST
With NASA’s James Webb Space Telescope successfully launched, the space agency and its partners will hold a press conference soon to celebrate the successful liftoff.
The press conference is expected to begin by 9 a.m. EST (1400 GMT) and should include the heads of agencies who built James Webb, as well as leading mission scientists.
You can watch it live in the window above. Meanwhile, here’s a look back at today’s successful launch.
James Webb Space Telescope launch a success
NASA’s James Webb Space Telescope is successfully in space and beginning its monthlong trek to its L2 home about 1 million miles from Earth.
“It’s a great day for planet Earth,” NASA Administrator Bill Nelson said after the launch. “We are going to discover incredible things that we never imagined.”
The accolades are pouring in from the space agencies who worked together to put the space telescope together with a series of interviews on NASA TV.
Spacecraft separation and solar array deploy
NASA’s James Webb Space Telescope has successfully separated from its Ariane 5 rocket and deployed its solar array to mark a flawless trip into space after today’s launch.
A camera on Webb’s Ariane 5 rocket upper stage beamed live views of the event, with solar array deployment occurring a bit early.
‘Go, Webb, go!” rang cheers from Arianespace launch control at the Guiana Space Center in French Guiana.
2nd stage shutdown
2nd stage shutdown: The Ariane 5 upper stage engine carrying NASA’s James Webb Space Telescope has shut down as planned.
James Webb Space Telescope on track during ascent
The Ariane 5 rocket carrying NASA’s James Webb Space Telescope continues its 2nd stage burn to carry the telescope into space.
“Very quiet now in the room,” NASA spokesperson Rob Navias says of launch control. Officials with NASA, Arianespace and their partners are watching telemetry carefully, he says.
So far, all systems are working as expected.
“Today’s countdown was as flawless as you can imagine,” Navias said. “Everything fell together on this Christmas Day to send a new present to the world’s astronomers.”
4 minutes of powered flight remain.
Upper Stage separation and ignition
Stage Separation: The Ariane 5 rocket carrying NASA’s James Webb Space Telescope has jettisoned its main stage and ignited its upper stage to continue powering the James Webb Space Telescope into orbit.
View of James Webb Space Telescope on Ariane 5
A camera aboard today’s Ariane 5 rocket launch has captured a view of the James Webb Space Telescope folded up for launch.
You can see that image above here.
Webb continues its ascent on its Ariane 5.
Stage separation for Ariane 5, Fairing separation
Stage separation: The 2 strap on boosters for the Ariane 5 rocket carrying the James Webb Space Telescope have separated as planned.
The rocket has also jettisoned its payload fairing.
“All parameters normal,” Arianespace reports.
Liftoff for the James Webb Space Telescope!
LIFTOFF! NASA’s James Webb Space Telescope launches on a mission to seek out the earliest light of the universe
James Webb Space Telescope in final countdown
The Ariane 5 rocket carrying NASA’s James Webb Space Telescope is now in its final automated launch countdown sequence.
A final launch weather check reveals good conditions for launch, Arianespace reports.
Less than 3 minutes remain until launch.
JWST launching 53 years after Apollo 8 Christmas broadcast
NASA spokesperson Rob Navias took a moment in today’s James Webb Space Telescope launch broadcast to remind viewers Webb is launching on Christmas Day, 53 years after NASA’s Apollo 8 crew beamed a Christmas Eve message to Earth from the moon. In that Christmas broadcast in 1968, the Apollo 8 astronauts read from the Bible’s Book of Genesis to mark the holiday.
“Today, more than a half century later. we’re just minutes away from another Genesis, the genesis of a new era of discovery,” Navias said. “The launch of the James Webb Space Telescope is at hand.”
James Webb Space Telescope on internal power
NASA’s James Webb Space Telescope is on internal battery power for today’s launch, a major milestone head of launch. NASA spokesperson Rob Navias says the observatory will remain on internal battery power until its solar arrays deploy about 30 minutes after liftoff.
It’s a cloudy day in Kourou for today’s launch, but Navias says all systems are still green.
“Don’t let those clouds fool you, we are go for launch,” Navias said.
T-30 minutes to James Webb Space Telescope launch
The James Webb Space Telescope is less than 30 minutes from launch for today’s Ariane 5 liftoff.
NASA spokesperson James Webb Space Telescope Rob Navias at the launch site reports all systems are green for launch so far, with liftoff on track for a 7:20 a.m. EST (1220 GMT) ignition.
Fueling complete for James Webb Space Telescope
Fueling is now complete! 👍Our #Ariane5 is sitting tight @EuropeSpacePort with its passenger: @NASAWebb/@ESA_Webb!#VA256 #WebbFliesAriane pic.twitter.com/LPs5y7xg0NDecember 25, 2021
Arianespace reports the fueling process for the Ariane 5 rocket is now complete for today’s launch of the James Webb Space Telescope.
NASA launch webcast live for JWST launch
Merry Christmas, space fans, it’s launch day for NASA’s James Webb Space Telescope.
After months of delays, the new Great Observatory is ready to launch at 7:20 a.m. EST (1220 GMT) atop an Arianespace Ariane 5 rocket from the Guiana Space Center in Kourou, French Guiana. NASA’s live launch webcast has begun for this Christmas launch, a rare event for NASA.
NASA is kicking off its webcast with its epic trailer for the James Webb Space Telescope mission, which uses the words of famed astronomer Carl Sagan.
‘Go’ for fueling
The Ariane 5 rocket that will launch the James Webb Space Telescope will begin fueling up for liftoff soon, according to the brief update just aired on NASA TV.
“Within the last hour mission controllers … received a comprehensive weather briefing and we were told conditions were ‘go’ for the start of the loading of 175 tons of propellant into the core or first stage of the Ariane five rocket,” a NASA spokesperson said in the update on NASA TV.
“150 tons of liquid oxygen and 25 tons of liquid hydrogen will soon be flowing into the first stage tanks of the Ariane 5. This process will take about two hours to complete. About an hour from now some 15 tons of propellant will be loaded into the second stage, or upper stage, of the Ariane 5 — another two-hour process, which should be complete around one hour and 22 minutes before launch.”
Go for fueling! 😊Get ready for our Flight #VA256 with @NASAWebb/@ESA_Webb on board #Ariane5!#VA256 #WebbFliesAriane pic.twitter.com/LxZ5ASoszqDecember 25, 2021
NASA to provide Webb telescope update
NASA officials are about to give a status update on the launch of the James Webb Space Telescope. You can watch it live in the window above, courtesy of NASA TV, or directly via YouTube (opens in new tab).
Just one day left
The James Webb Space Telescope is still on track for a Christmas Day launch, after spending the night of Dec. 23 on the launch pad in Kourou, French Guiana. Arianespace, which built the Ariane 5 rocket carrying the observatory, has confirmed that the weather forecast looks promising for the Saturday launch attempt. “Latest weather forecast just arrived and we are still good to go for tomorrow!” the European launch provider wrote in a statement posted to Twitter (opens in new tab).
Webb is on the launch pad!
The Ariane 5 rocket carrying the James Webb Space Telescope made the two-hour trek out to the launch pad at Kourou, French Guiana, on Thursday (Dec. 23). See more photos
Roll-out is coming!
Let the roll-out to the launch pad begin for @ariane5 and #Webb! 🚀The doors of the assembly building have opened @EuropeSpacePort #WebbFliesAriane #JWST #VA256 📸 ESA – S. Corvaja pic.twitter.com/iMfgce4yLiDecember 23, 2021
The James Webb Space Telescope and its Ariane 5 rocket will begin the slow march to the launch pad at Kourou, French Guiana, in advance of the mission’s Saturday morning launch at about 10 a.m. EST (1500 GMT) on Dec. 23.
Christmas Day launch still on track for JWST
The target launch date for the @NASAWebb/@ESA_Webb is confirmed on December 25, as early as possible within the following launch window: pic.twitter.com/aGB1ABzML5December 22, 2021
Arianespace, the European company responsible for launching the James Webb Space Telescope, confirmed in a tweet (opens in new tab) on Wednesday (Dec. 22) afternoon that they were still targeting Christmas Day (Saturday, Dec. 25) for the launch of the massive observatory.
The rocket, an Ariane 5, will roll out to the launch pad at Kourou, French Guiana, on Thursday morning (Dec. 23), the company noted.
High winds delay launch to Christmas
However, due to adverse weather conditions at Europe’s Spaceport in French Guiana, the flight #VA256 to launch the James Webb Space Telescope –initially scheduled for December 24– is being postponed.December 21, 2021
Arianespace has announced (opens in new tab) that due to upper-level winds, it will not attempt to launch the James Webb Space Telescope on Friday (Dec. 24). The next launch opportunity will be Saturday (Dec. 25) beginning at 7:20 a.m. EST (1220 GMT).
NASA Webb Space Telescope prelaunch briefing
With the clocking steadily ticking toward a Christmas Eve launch for the James Webb Space Telescope, NASA and its partners will hold a prelaunch teleconference for the mission today, Dec. 21, at 2 p.m. EST (1900 GMT) and you can watch it live.
The webcast will be broadcast on NASA Live (opens in new tab) and simulcast in the audio player at the top of this page.
Speaking during today’s prelaunch press conference will be:
- NASA Administrator Bill Nelson
- NASA Deputy Administrator Pam Melroy
- Thomas Zurbuchen, associate administrator for NASA’s Science Mission Directorate, NASA Headquarters in Washington
- Greg Robinson, Webb program director, NASA Headquarters
- Jérôme Rives, vice president, Ariane 5 Business Unit, Arianespace, Paris, France
- Amber Straughn, Webb deputy project scientist for communications, NASA’s Goddard Space Flight Center in Greenbelt, Maryland
Three days until launch!
With three days to go before the James Webb Space Telescope launches, NASA has released a mission trailer paired with archival audio of the iconic astronomer Carl Sagan. “If we crave some cosmic purpose, then let us find ourselves a worthy goal,” Sagan said. Watch the full trailer above.
And learn about the incredible engineering behind the most complex space observatory ever built with a deep dive into the telescope that “is not allowed to fail” in this new feature story.
What will the James Webb Space Telescope tell us about dark matter?
The world’s most powerful space telescope is about to launch, and scientists think it could reveal incredible new information about dark matter.
The James Webb Space Telescope is set to launch on Dec. 24. from Europe’s Spaceport in Kourou, French Guiana. By observing primarily in infrared, the massive telescope will be able to peer back farther than ever into the cosmos, revealing new information about our early universe. However, additionally, scientists think that the scope could utilize the phenomenon known as gravitational lensing, from Einstein’s general theory of relativity, to indirectly “observe” evidence of dark matter.
It’s Launch Week for James Webb Space Telescope
It’s launch week for NASA’s James Webb Space Telescope and as the days count down to its Christmas Eve launch on Dec. 24, we’re taking a look at the science promised by the huge new space observatory.
Space.com senior writer Chelsea Gohd takes a look at the fundamental differences between the iconic Hubble Space Telescope, which can capture images in visible light, and the James Webb Space Telescope, which is solely an infrared observatory, but one so sensitive it’s designed to peer back closer to the birth of the universe than ever before.
Dec. 24 launch date confirmed for Webb space telescope
NASA and its partners officially confirmed Dec. 24 as the launch target for the new James Webb Space Telescope. Liftoff is set for 7:20 a.m. EST (1220 GMT) from the Guiana Space Center in Kourou, French Guiana.
NASA confirmed the launch target today in a blog post, stating that the Webb space telescope is packed inside its nosecone and attached to its Arianespace Ariane 5 rocket.
“The James Webb Space Telescope is confirmed for the target launch date of Dec. 24, at 7:20 a.m. EST,” NASA wrote (opens in new tab). “Late yesterday, teams at the launch site successfully completed encapsulation of the observatory inside the Ariane 5 rocket that will launch it to space. Webb’s launch final readiness review will be held on Tuesday Dec. 21 and, if successful, roll-out is planned for Wednesday, Dec. 22.”
Launch date confirmation coming Saturday
The James Webb Space Telescope is still tentatively scheduled to launch on Dec. 24, but the launch date won’t be officially confirmed until tomorrow (Saturday, Dec. 18), according to Arianespace CEO Stéphane Israël.
“Final encapsulation operations ongoing,” Israël tweeted (opens in new tab) late Friday. “Target launch date is December 24 at 12:20 am UTC. Confirmation Saturday.”
Final encapsulation operations ongoing. Need a few more hours to complete them. Target launch date is December 24 at 12:20 am UTC. Confirmation Saturday. Go @NASAWebb/@ESA_Webb! Go #Ariane5! Go! 🎅🚀#WebbFliesAriane #VA256 pic.twitter.com/15wvWpaD3RDecember 17, 2021
NASA, ESA discussing Webb space telescope launch date
NASA and the European Space Agency are discussing their options today (Dec. 17) on when to launch the multibillion-dollar James Webb Space Telescope.
Earlier this week, the two agencies and their partners delayed the Webb telescope’s Dec. 22 launch after a data cable issue prevented communications between the observatory and equipment with its Ariane 5 rocket. The launch is currently targeted for no earlier than Dec. 24, but that launch date could change.
NASA and ESA have both said they will announce a firmer launch date by then end of the day today, Dec. 17. The faulty data cable on Webb was fixed yesterday afternoon and engineers were expected to perform final tests before making a decision on whether to close up the space telescope inside its clamshell-like payload fairing.
The Webb space telescope is NASA’s next “Great Observatory” and set to launch on an Arianespace Ariane 5 rocket from Guiana Space Center in Kourou, French Guiana.
The mission has been delayed several times in recent months, from an October launch target to late December due to launch preparation issues.
Data cable fixed on James Webb Space Telescope
Just in from the Webb launch site: The team has fixed the connection issue and @NASAWebb is in the midst of its final scheduled aliveness test before launch. We’ll provide an additional update on the status of encapsulation and the launch date tomorrow. pic.twitter.com/ehFVzfeeCIDecember 16, 2021
Dr. Thomas Zurbuchen, NASA’s associate administrator for science missions, announced on Twitter today that the launch team for the agency’s James Webb Space Telescope has fixed the data cable connection issue that has delayed the space observatory’s launch. A new launch date will be announced on Friday, Dec. 18.
“Just in from the Webb launch site: The team has fixed the connection issue and @NASAWebb is in the midst of its final scheduled aliveness test before launch,” Zurbuchen wrote on Twitter. “We’ll provide an additional update on the status of encapsulation and the launch date tomorrow.”
The Webb Space Telescope is currently targeted to launch no earlier than Dec. 24, two days later than planned due to the data cable issue.
Faulty cable caused JWST launch delay
A faulty communications cable is responsible for the James Webb Space Telescope’s latest delay, according to the European Space Agency.
In a press conference today (Dec. 16), ESA officials said a faulty data designed to deliver data from the Webb space telescope and its rocket and launch pad equipment was not working properly.
“It’s an interface issue in the electrical network connecting the observatory and the ground support equipment,” Daniel Neuenschwander, ESA director of space transportation, said in the briefing. “It’s a cable located in the launch table, which is experiencing some intermittent losses of data.”
JWST packed for flight
On Saturday, Dec. 11, Arianespace packed NASA’s James Webb Space Telescope for launch, installing the space telescope atop its Ariane 5 rocket for a planned launch from the Guiana Space Center in Kourou, French Guiana.
The actual launch date for the Webb space telescope is still uncertain, as NASA and Arianespace have delayed its launch (initially set for Dec. 22) to no earlier than Dec. 24. An update on launch plans for Webb is expected by Friday, Dec. 17, according to NASA.
NASA and Arianespace originally aimed to launch the Webb space telescope on Oct. 31 and have delayed it repeatedly due to integration and other issues. Watch this space for updates on a new firm launch date for the James Webb Space Telescope.
JWST launch delayed to Dec. 24
The James Webb Space Telescope is now scheduled to launch no earlier than Christmas Eve (Dec. 24), NASA announced today.
“The James Webb Space Telescope team is working a communication issue between the observatory and the launch vehicle system,” NASA officials said in a statement (opens in new tab). “This will delay the launch date to no earlier than Friday, Dec. 24. We will provide more information about the new launch date no later than Friday, Dec. 17.”
James Webb Space Telescope ready to launch
After years of development and billions of dollars, NASA’s James Webb Space Telescope is nearly ready to launch.
Follow JWST’s last days on Earth and its future as a new Great Observatory for NASA, the European Space Agency, Canadian Space Agency and the world in our live coverage here.