Omega Centauri, Caldwell 80

Hubble’s Wide Field Camera 3 captured this image in ultraviolet and visible light showing 100,000 stars in the core of Caldwell 80 (Omega Centauri) soon after the camera was installed in 2009. The stars’ colors give us information about them. Bright blue stars are old, hot stars that are fusing helium in their cores. Bright red stars are cool giants that are heading into old age. Dimmer red stars are cool dwarfs destined to live for a long time. White stars are typically middle-aged, average stars.