Our NASA solar scientists Holly, Alex and Phil answer some common questions about the sun, space weather, and how they affect the Earth. This is a two-part series.
Part One addresses:

1. What is space weather?
2. What are coronal mass ejections?
3. What are solar flares?
4. What are solar energetic particles?
5. What causes flares and CMEs?

Credit: NASA / NASA Goddard Space Flight Center

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