A large, perhaps 200,000 mile long, dark filament with a total mass of a billions of tons or more has been visible on the southern hemisphere of the Sun for the past several days (lower right side of the upper image), but it was gone the next day (lower image). Where’d it go?
The filament is held aloft over the sun by intense magnetic fields. Sometimes the magnetic fields become unstable, break apart and then reconnect with explosive energy that flings part of the filament out into space, an event known as a “coronal mass ejection.” Some of this may reach Earth and cause an increase in northern lights, some minor disruption of radio communications, and induce power surges in electrical lines. For a video of the actual ejection event from the Solar Dynamics Observatory, see: https://spaceweather.com/images2023/04jun23/filament_crop.gif.
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#coronalmassejection #solarfilament #sun
Eskildoodle Photos and Feelings 
That’s really amazing. Fun link too.
What is the mass just outside the circle of the sun at ~2 o’clock?
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That is a “prominence” which is the similar to the “filament” that disappeared, only it is positioned at the horizon of the solar disk. It probably rises more than 20 thousand miles above the edge of the sun.
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