Barnard's Loop

emission nebula in the constellation of Orion

Barnard's Loop is an emission nebula in the constellation of Orion. It is about 1,600 light-years away from Earth. It is part of the Orion complex. It is a semicircular arc that is about 300 light-years across.[1] In the center of Bernard's Loop are two nebula. These are the Orion nebula and the Horsehead nebula.[1] Barnard’s Loop is made up of Plasma. The mainly red color comes from hydrogen gas.[2]

Barnard's Loop
Observation data
Right ascension 05h 27.5m
Declination−03° 58′
Distance1434 ly
Apparent magnitude (V)5
ConstellationOrion
Physical characteristics
Other designationsSh2-276
See also: Diffuse nebula, Lists of nebulae

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  1. 1.0 1.1 Nigel Henbest; Michael Marten, The Guide to the Galaxy (Cambridge; New York: Press Syndicate of the University of Cambridge, 1994), p. 139
  2. Nigel Henbest, The New Astronomy (Cambridge; New York: Press Syndicate of the University of Cambridge, 1996), p. 60

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