About 1500 light-years away, the Cygnus Loop nebula glows bright in ultraviolet blue.
Left over from a massive stellar explosion that occurred between 5,000 to 8,000 years ago, the Cygnus Loop extends over three times the size of the full Moon in our night sky.
This image was captured in 2012 by the Galaxy Evolution Explorer. The orbiting space telescope was designed to observe the universe in ultraviolet wavelengths to measure the history of star formation in the universe.
Credit: NASA/JPL-Caltech