Synonyms of Planetary Nebula in English :
Antonyms of Planetary Nebula in English
Thesaurus of Planetary Nebula in English
Planetary Nebula
see definition of planetary nebulaHypernyms of planetary nebula
1. (noun) a nebula that was once thought to be a star with its planets but is now thought to be a very hot star surrounded by an expanding envelope of ionized gases that emit a fluorescent glow because of intense radiation from the star