DECam Images RCW 86, Remains of Supernova Witnessed in 185

The tattered shell of the first-ever recorded supernova was captured by the US Department of Energy-fabricated Dark Energy Camera, which is mounted on the National Science Foundation’s (NSF) Víctor M. Blanco 4-meter Telescope at Cerro Tololo Inter-American Observatory in Chile, a Program of NSF NOIRLab. A ring of glowing debris is all that remains of a white dwarf star that exploded more than 1800 years ago when it was recorded by Chinese astronomers as a ‘guest star’. This special image, which covers an impressive 45 arcminutes on the sky, gives a rare view of the entirety of this supernova remnant.