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What are coronal mass ejections?

9 Dec 2020, 11:00 UTC
What are coronal mass ejections? NASA/GSFC/SDO

Every so often, the sun burps, with the power of 20 million nuclear bombs. These hiccups are known as coronal mass ejections or CMEs. They are powerful eruptions near the surface of the sun, driven by kinks in the solar magnetic field. The resulting shocks ripple through the solar system and can interrupt satellites and power grids on Earth.

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