Important notice about STEREO Behind
A long filament erupted into space as seen by STEREO?s Ahead spacecraft (Apr. 22, 2012). This shows a combination of the Sun taken in extreme UV light superimposed on the Sun?s corona (seen in green). Filaments are elongated clouds of cooler gases suspended above the Sun by magnetic forces. They are often unstable and erupt. The video covers 11 hours of activity.
Last Revised: March 19, 2018 15:00:39 UTC
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