Space Image: Cygnus Loop Nebula
(PhysOrg.com) -- Wispy tendrils of hot dust and gas glow brightly in this ultraviolet image of the Cygnus Loop Nebula, taken by NASAs Galaxy Evolution Explorer.
The Cygnus Loop extends more than three times the size of the full moon in the night sky, and is tucked next to one of the 'swans wings' in the constellation of Cygnus.
The filaments of gas and dust visible here in ultraviolet light were heated by the shockwave from the supernova, which is still spreading outward from the original explosion. The original supernova would have been bright enough to be seen clearly from Earth with the naked eye.