Concept information
Terme préférentiel
emission nebula
Définition
- 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. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Emission_nebula)
Concept générique
Concepts spécifiques
Synonyme(s)
- emission nebulae
Traductions
-
français
-
nébuleuse en émission
URI
http://data.loterre.fr/ark:/67375/MDL-B516CG99-P
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