RCW 58

This is an image of RCW 58. It is a nebula formed by the massive Wolf-Rayet star, WR40, in the middle of the nebula. This star is about 100 times as massive as our Sun, a million times more luminous, and with 30 times the surface temperature. The central star WR 40 ejects the atmosphere at a speed of nearly 100 kilometers per second, and these outer layers have become the expanding oval-shaped nebula RCW 58