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 ?
Less well-known is the nearby arc comprising Barnard's Loop, an emission nebula included by Herschel in his list of 52 nebulous regions.
The picture showed, with remarkable clarity, not only the familiar Orion Nebula and the diffuse Horsehead complex around Zeta Orionis, but also the feathery, winding form of Barnard's Loop.
Using a fast 50-mm lens and a modified DSLR, I was shocked to clearly record Barnard's Loop and the Horsehead Nebula in Orion above the majestic Himalayan peaks with only a 20-second exposure.
The Orion and Horsehead nebulae, though two of the most famous deep-sky objects in the heavens, are almost lost in the general tangle of nebulosity inside the arc of Barnard's Loop.
Barnard's Loop is the remarkably long arc of nebulosity that sweeps through Orion in a huge semicircle about 12[degrees] in diameter.