KnowraH II regionLinked fromLinked fromThe 52 pages that link to H II region, each with the reason it gives.All 52Broader topic 18Related 17Narrower topic 7Compared with 10Supernova remnantCompared with: Both can appear as glowing gas clouds, but an H II region is energized by stellar radiation rather than supernova debris.Planetary nebulaCompared with: Both glow through photoionized gas, but H II regions are powered by young stars, not stellar remnants.Herbig–Haro objectCompared with: Its gas is primarily ionized by starlight, unlike the shock-powered emission in these objects.Neutral hydrogenCompared with: It marks environments where ultraviolet light has converted neutral atoms into protons and electrons.Bok globuleCompared with: Bright ionized gas contrasts with the dark silhouette of a Bok globule against illuminated nebulae.Luminous infrared galaxyCompared with: Such regions mark star formation locally, but do not by themselves constitute an infrared-luminous galaxy.Reflection nebulaCompared with: Its hydrogen emission can distinguish it from adjacent dust-scattered glow.H I regionCompared with: Ionization distinguishes H II regions from predominantly neutral H I regions.High-velocity cloudCompared with: It is an ionized nebula, unlike the neutral hydrogen traced in high-velocity clouds.Low-ionization nuclear emission-line regionCompared with: H II regions are powered by massive stars and usually occupy a different diagnostic locus.