Really Long Filament 
This week the Sun featured a very long filament that stretched at least half way across the Sun (Oct. 20-22, 2015). Filaments are elongated clouds of plasma that are tethered above the Sun by magnetic forces. They are often unstable and usually break apart in less than a week, though they can last longer than that. Filaments are darker than most of the SunÕs surface when viewed in extreme ultraviolet light, as it is here. Credit: Solar Dynamics Observatory, NASA.
Search Tag(s): aia, 193, filaments
Movies
- Filament193_Oct_big.mp4 - mp4
- Filament193_Oct_sm.mp4 - mp4