description Barnard's Loop (Sh2-276) Overview
Barnard's Loop, cataloged as Sh2-276, is a massive emission nebula located in the constellation of Orion. It appears as a large, faint, semicircular arc of glowing red gas that spans approximately 10 degrees across the night sky, making it too dim to be seen with the naked eye but highly prominent in long-exposure astrophotography. Named after astronomer Edward Emerson Barnard, who photographed it in 1894, the structure is believed to be a stellar-wind bubble driven by the young, hot stars of the Orion OB1 association.
help Barnard's Loop (Sh2-276) FAQ
Who discovered Barnard's Loop?
Barnard's Loop was first photographed by American astronomer Edward Emerson Barnard in 1894. It is officially cataloged as Sh2-276 in the Sharpless catalog of emission nebulae.
What is the origin of Barnard's Loop?
Astronomers believe the vast semicircular nebula is either a supernova remnant or a stellar-wind bubble. It is thought to have been sculpted by the massive stars of the Orion OB1 association.
Where in the night sky is Barnard's Loop located?
This massive emission nebula forms a huge arc around the belt and sword of the constellation Orion. It encompasses the famous Orion Nebula (M42) and much of the Orion molecular cloud complex.
What type of telescope do you need to see Barnard's Loop?
Barnard's Loop is incredibly faint and extremely difficult to see visually, even with large telescopes. It is primarily captured using wide-field astrophotography setups with specialized hydrogen-alpha filters.
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