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 (Rev. 2)
NGC2239 Rosette Nebula (Rev. 2)
SH2-155 Cave Nebula (Rev. 2)
SH2-155 Cave Nebula (Rev. 2)
IC1396 Elephant’s Trunk Nebula (Rev. 1)
IC1396 Elephant’s Trunk Nebula (Rev. 1)
NGC2359 Thor’s Helmet (Rev. 1)
NGC2359 Thor’s Helmet (Rev. 1)
NGC2239 Rosette Nebula (Rev. 1)
NGC2239 Rosette Nebula (Rev. 1)
SH2-155 Cave Nebula (Rev. 1)
SH2-155 Cave Nebula (Rev. 1)
IC5070 Pelican Nebula (Rev. 1)
IC5070 Pelican Nebula (Rev. 1)