emission nebula
noun Astronomy.
a bright diffuse nebula that emits light as a result of ionization of its gas atoms by ultraviolet radiation, as the Orion Nebula, planetary nebulae, and supernova remnants, as the Crab Nebula.
Words nearby emission nebula
emirate,
emiscan,
emissary,
emissary vein,
emission,
emission nebula,
emission spectrum,
emissive,
emissivity,
emit,
emittance
British Dictionary definitions for emission nebula
Scientific definitions for emission nebula
emission nebula
[ ĭ-mĭsh′ən ]
A nebula that absorbs ionizing ultraviolet radiation from nearby hot stars or star remnants and reemits it as visible light. HII regions, planetary nebulae, and nebulae created by the explosion of supernovae are different kinds of emission nebulae. See more at nebula.