Emission Nebulae

An emission nebula is a nebula formed of ionized gases that emit light of various wavelengths. The most common source of ionization is high-energy ultraviolet photons emitted from a nearby hot star. Among the several different types of emission nebulae are H II regions, in which star formation is taking place and young, massive stars are the source of the ionizing photons; and planetary nebulae, in which a dying star has thrown off its outer layers, with the exposed hot core then ionizing them. (Source: Wikipedia)

NGC2239 Rosette Nebula - standard version

Emission Nebulae

NGC2239 Rosette Nebula (Rev. 2)

SH2-155 Cave Nebula (Rev. 2)

IC1396 Elephant’s Trunk Nebula (Rev. 1)

NGC2359 Thor’s Helmet (Rev. 1)

NGC2239 Rosette Nebula (Rev. 1)

SH2-155 Cave Nebula (Rev. 1)

IC5070 Pelican Nebula (Rev. 1)