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Planets of Milky Way's most common stars are less habitable than thought, dead NASA telescope reveals
Launched in April 2003, GALEX scanned the universe in UV light ... Berger said that more space telescope data will be needed before the source of the UV emissions in these red dwarf flares ...
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NGC 7293, better known as the Helix nebula, displays its ultraviolet glow courtesy of NASA's Galaxy Evolution Explorer (GALEX).
In this image from NASA's Spitzer Space Telescope, "cometary knots" on the Helix Nebula show blue-green heads caused by excitation of their molecular material from shocks or ultraviolet radiation.