Barnard's Loop

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.Nigel Henbest; Michael Marten, The Guide to the Galaxy (Cambridge; New York: Press Syndicate of the University of Cambridge, 1994), p. 139 In the center of Bernard's Loop are two nebula. These are the Orion nebula and the Horsehead nebula. Barnard’s Loop is made up of Plasma. The mainly red color comes from hydrogen gas.Nigel Henbest, The New Astronomy (Cambridge; New York: Press Syndicate of the University of Cambridge, 1996), p. 60

Related pages
 Orion (constellation)
 Nebulae

 References 

Other websites
 Barnard's Loop (Sh2-276)
 Barnard's Loop and more in Orion-Today's image-EarthSky
 APOD: 2005 April 20 - Barnard's Loop Around Orion

Category:Nebulae