英语词汇“planetary 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

planetary nebula

释义

Noun: planetary nebula

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

Derived forms: planetary nebulae

Type of: nebula

Encyclopedia: Planetary nebula

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