On Sept. 30, 2014, a dark snaking line shows a filament of solar material hovering above the sun's surface.
A dark snaking line in the upper right of this image on Sept. 30, 2014, show a filament of solar material hovering above the sun’s surface.If straightened out, the filament would reach almost across the whole sun, about 1 million miles or 100 times the size of Earth. NASA’s Solar Dynamics Observatory, or SDO, captured the image in extreme UV light of 304 Angstrom and 335 Angstrom – different colors represent different wavelengths of light and different temperatures of solar material. Credit: NASA/SDO