Solar wind: What is it and how does it affect Earth?

The solar wind is a continual stream of protons and electrons from the sun’s outermost atmosphere — the corona. 

These charged particles breeze through the solar system at speeds ranging from around 250 miles (400 kilometers) per second to 500 miles (800 km) per second, in a plasma state, according to the National Oceanic and Administration Space Weather Prediction Center (opens in new tab) (SWPC). 

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