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- Q808444 subject Q7111923.
- Q808444 subject Q8380127.
- Q808444 subject Q8735551.
- Q808444 subject Q9115572.
- Q808444 abstract "Barnard's Loop (catalogue designation Sh 2-276) is an emission nebula in the constellation of Orion. It is part of the Orion Molecular Cloud Complex which also contains the dark Horsehead and bright Orion nebulae. The loop takes the form of a large arc centred approximately on the Orion Nebula. The stars within the Orion Nebula are believed to be responsible for ionizing the loop.The loop extends over about 600 arcminutes as seen from Earth, covering much of Orion. It is well seen in long-exposure photographs, although observers under very dark skies may be able to see it with the naked eye.Recent estimates place it at a distance of either 159 pc (518 light years) or 440 pc (1434 ly) giving it dimensions of either about 100 or 300 ly across respectively. It is thought to have originated in a supernova explosion about 2 million years ago, which may have also created several known runaway stars, including AE Aurigae, Mu Columbae and 53 Arietis, which are believed to have been part of a multiple star system in which one component exploded as a supernova.Although this faint nebula was certainly observed by earlier astronomers, it is named after the pioneering astrophotographer E. E. Barnard who photographed it and published a description in 1894.".
- Q808444 thumbnail BarnardLoopHunterWilson.jpg?width=300.
- Q808444 wikiPageExternalLink ap120312.html.
- Q808444 wikiPageExternalLink Barnards_Loop.html.
- Q808444 wikiPageExternalLink ORION_O.HTM.
- Q808444 wikiPageWikiLink Q1133939.
- Q808444 wikiPageWikiLink Q12129.
- Q808444 wikiPageWikiLink Q13903.
- Q808444 wikiPageWikiLink Q14271.
- Q808444 wikiPageWikiLink Q147572.
- Q808444 wikiPageWikiLink Q1536490.
- Q808444 wikiPageWikiLink Q16742.
- Q808444 wikiPageWikiLink Q202265.
- Q808444 wikiPageWikiLink Q204999.
- Q808444 wikiPageWikiLink Q22066400.
- Q808444 wikiPageWikiLink Q2565783.
- Q808444 wikiPageWikiLink Q2703.
- Q808444 wikiPageWikiLink Q280855.
- Q808444 wikiPageWikiLink Q28390.
- Q808444 wikiPageWikiLink Q291545.
- Q808444 wikiPageWikiLink Q3937.
- Q808444 wikiPageWikiLink Q42372.
- Q808444 wikiPageWikiLink Q506254.
- Q808444 wikiPageWikiLink Q531.
- Q808444 wikiPageWikiLink Q6440.
- Q808444 wikiPageWikiLink Q7111923.
- Q808444 wikiPageWikiLink Q752071.
- Q808444 wikiPageWikiLink Q798287.
- Q808444 wikiPageWikiLink Q8380127.
- Q808444 wikiPageWikiLink Q8735551.
- Q808444 wikiPageWikiLink Q8860.
- Q808444 wikiPageWikiLink Q8928.
- Q808444 wikiPageWikiLink Q9115572.
- Q808444 comment "Barnard's Loop (catalogue designation Sh 2-276) is an emission nebula in the constellation of Orion. It is part of the Orion Molecular Cloud Complex which also contains the dark Horsehead and bright Orion nebulae. The loop takes the form of a large arc centred approximately on the Orion Nebula. The stars within the Orion Nebula are believed to be responsible for ionizing the loop.The loop extends over about 600 arcminutes as seen from Earth, covering much of Orion.".
- Q808444 label "Barnard's Loop".
- Q808444 depiction BarnardLoopHunterWilson.jpg.