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Join the NASA Night Sky Network on Tuesday, July 20 at 6:00pm Pacific Time (9:00pm Eastern) to hear Dr. Nicholeen Viall give an update on NASA's PUNCH mission to study the Sun's corona.
The Sun’s outer atmosphere, the corona, is hundreds of times hotter than the visible surface of the Sun below it. This super-hot coronal plasma (electrons and ions) expands outwards in all directions, accelerating up to millions of miles per hour, carrying part of the Sun’s magnetic field with it, and...