STEREO - Solar Terrestrial Relations Observatory
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Important notice about STEREO Behind

Epic Filament Eruption

image143

A very long solar filament that had been snaking around the Sun erupted (Dec. 6, 2010) with a flourish. STEREO (Behind) caught the action in dramatic detail in extreme ultraviolet light of Helium. It had been almost a million km long (about half a solar radius) and a prominent feature on the Sun visible over two weeks earlier before it rotated out of view. Filaments, elongated clouds of cooler gases suspended above the Sun by magnetic forces, are rather unstable and often break away from the Sun. Other images and video clips of this event as seen by Solar Dynamics Observatory (SDO) can be seen here: http://sdo.gsfc.nasa.gov/gallery/main.php?v=item&id=45


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