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	Trends of planetary nebula View usage for: planetary nebula in British English noun an expanding shell of gas surrounding a dying star, formed from matter ejected from the star's outer layers; the gas is ionized by the remaining hot stellar core, emitting light in the process Word origin C18: named from its (occasional) resemblance to a planetary disc planetary nebula in American English a glowing, expanding nebula that forms around a collapsing star Word origin from its resemblance, when viewed through a telescope, to a planet
随便看	drop-anchor drop anchor to cast anchor drop an f-bomb drop astern drop a stitch drop away drop back drop back or behind drop bear drop behind drop by drop cannon dropcloth drop cookie drop curtain drop dead drop-dead drop-dead date drop-dead fee drop-dead gorgeous drop-down drop (down) dead drop-down-dead drop-down menu drop-down-menu

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Trends ofplanetary nebula