The Glowing Eye of NGC 6751

Depicts: NGC 6751, IRAS 19032-0604
Copyright: NASA, The Hubble Heritage Team (STScI/AURA)
Planetary nebulae have nothing to do with planets. They are shells of gas thrown off by Sun-like stars nearing the ends of their lives. The star's loss of its outer gaseous layers exposes the hot stellar core, whose strong ultraviolet radiation then causes the ejected gas to fluoresce as the planetary nebula.
Last Update: 1 September 2019