Cygnus Loop
The Cygnus Loop is a large supernova remnant in the constellation Cygnus, resulting from a massive star explosion about 10,000 years ago. It encompasses the Veil Nebula.
Source: nasa.gov
APODs including "Cygnus Loop"
Cygnus Loop Supernova Shockwave
18/07/1995
July 18, 1995 Cygnus Loop Supernova Shockwave Credit: NASA, HST, WFPC2, Jeff Hester Explanation: 15,000 years ago a star in the constellation of Cygnus exploded. This picture shows a portion of a shockwave from this supernova explosion still expanding past nearby stars. The collision of this gaseous shockwave with a stationary gas cloud has heated the gas causing it to glow in a spectacular array of colors, known as the Cygnus Loop. This picture was taken with the Wide Field and Planetary Camera 2 on board the Hubble Space Telescope. For more information see the NASA Hubble Space Telescope press release. We keep an archive of Astronomy Pictures of the Day. Astronomy Picture of the Day is brought to you by Robert Nemiroff and Jerry Bonnell . Original material on this page is copyrighted to Robert J. Nemiroff and Jerry T. Bonnell.