Barnard's loop


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Barnard's loop

or

ring

(bar -nardz) see Orion.

Barnard's loop

[′bär·nərdz ‚lüp]
(astronomy)
A large emission nebula, about 10° by 140° in size, around the central portion of Orion, that consists of an expanding shell of gas that probably originated in a supernova.
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References in periodicals archive ?
A large arcing cloud of gas to the east of the belt stars is known as Barnard's Loop and marks a supernova long past - its cloud still visible to those with equipment sensitive enough.
The cloud also contains other well-known objects such as the Great Orion Nebula (M42), the Flame Nebula, and Barnard's Loop.
Before the days of the digital SLR, a popular target for film astrophotography was Barnard's Loop, a very long and wide loop of gas to the east of Orion, probably a supernova remnant.