英语词汇“emission nebula”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	emission nebula
释义	WordReference Random House Unabridged Dictionary of American English © 2024 emis′sion neb′ula, [Astron.] Astronomya 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.
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