What is Barnard's Loop?
{{Infobox diffuse nebula | name = Barnard's Loop | image=BarnardLoopHunterWilson.jpg | caption = | ra = {{RA|05|27.5}} | dec = {{DEC|-03|58}} | dist_ly = 1434 [[light year|ly]] | appmag_v = 5 | constellation = [[Orion (constellation)|Orion]] | names = Sh2-276 }} '''Barnard's Loop''' is an [[emission nebula]] in the [[constellation]] of [[Orion (constellation)|Orion]]. It is about 1,600 [[light-year]]s away from [[Earth]]. It is part of the [[Orion complex]]. It is a [[Semicircle|semicircular]] [[arc]] that is about 300 light-years across.<ref name=Henbest139>Nigel Henbest; Michael Marten, ''The Guide to the Galaxy'' (Cambridge; New York: Press Syndicate of the University of Cambridge, 1994), p. 139</ref> In the [[wikt:center|center]] of Bernard's Loop are two nebula. These are the [[Orion nebula]] and the [[Horsehead nebula]].<ref name=Henbest139/> Barnard’s Loop is made up of [[Plasma (physics)|Plasma]]. The mainly [[red]] color comes from [[hydrogen]] gas.<ref>Nigel Henbest, ''The New Astronomy'' (Cambridge; New York: Press Syndicate of the University of Cambridge, 1996), p. 60</ref> ==Related pages== * [[Orion (constellation)]] * [[Nebulae]] == References == {{reflist}} ==Other websites== * [http://www.daviddarling.info/encyclopedia/B/Barnards_Loop.html Barnard's Loop (Sh2-276)] * [http://earthsky.org/todays-image/barnards-loop-and-more-in-orion Barnard's Loop and more in Orion-Today's image-EarthSky] * [https://apod.nasa.gov/apod/ap050420.html APOD: 2005 April 20 - Barnard's Loop Around Orion] {{sci-stub}} [[Category:Nebulae]]