Cygnus loop nebula, a supernova remnant in Cygnus constellation (Sharpless 103) (Giulio Ercolani)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: IC 1340 · NGC 6960 · NGC 6979 · NGC 6992 · NGC 6995 · The star 49 Cyg · The star 52 Cyg · Veil Nebula

Cygnus loop nebula, a supernova remnant in Cygnus constellation (Sharpless 103), Giulio Ercolani

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Cygnus loop nebula, a supernova remnant in Cygnus constellation (Sharpless 103)

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Cygnus loop nebula, a supernova remnant in Cygnus constellation (Sharpless 103)

"The nebula lies about 1,500 light-years away, and is a supernova remnant, 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 the night sky, and is tucked next to one of the "swan's wings" in the constellation of Cygnus."(NASA)

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Cygnus loop nebula, a supernova remnant in Cygnus constellation (Sharpless 103)

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Cygnus loop nebula, a supernova remnant in Cygnus constellation (Sharpless 103)

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