What is SGR 1806-20?
[[File:Artist’s_impression_of_the_magnetar_in_the_star_cluster_Westerlund_1.jpg|250px|right|thumb|Artist's painting of SGR 1806-20.]]'''SGR 1806-20''' is a [[pulsar]] in the [[constellation]] [[Sagittarius (constellation)|Sagittarius]]. It is located 50,000 [[light year]]s away from the [[Sun]] and [[Earth]] in the star cluster 1806-20, with the star [[LBV 1806-20]]. On December 27, 2004, radiation from a [[gamma-ray burst]] caused by the star became the brightest event from outside the [[Solar System]].<ref>{{Cite web|url=http://www.nasa.gov/vision/universe/watchtheskies/swift_nsu_0205.html|title=NASA - Cosmic Explosion Among the Brightest in Recorded History|access-date=2019-06-24|archive-date=2017-10-25|archive-url=https://web.archive.org/web/20171025154039/http://www.nasa.gov/vision/universe/watchtheskies/swift_nsu_0205.html|url-status=dead}}</ref><ref>{{Cite web|url=https://www.nasa.gov/vision/universe/watchtheskies/swift_nsu_0205.html|title=NASA - Cosmic Explosion Among the Brightest in Recorded History|access-date=2019-06-24|archive-date=2017-10-25|archive-url=https://web.archive.org/web/20171025154039/https://www.nasa.gov/vision/universe/watchtheskies/swift_nsu_0205.html|url-status=dead}}</ref><ref>{{Cite journal|url=http://www.slate.com/blogs/bad_astronomy/2012/12/27/cosmic_blast_magnetar_explosion_rocked_earth_on_december_27_2004.html|title = Eight Years Ago Today, Earth Was Slammed by a Huge Cosmic Blast| journal=Slate |date = 27 December 2012| last1=Plait | first1=Phil }}</ref> == References == {{reflist}} {{sci-stub}} {{physics-stub}} [[Category:Variable stars]]