planetary nebula
短语行星状星云
发音
US
词形变化
planetary nebulae
planetary nebulas
复数
planetary nebulas
planetary nebulae
复数
别名
PN
释义与例句
n.
-
1.
A nebulosity surrounding a dying red giant, consisting of material expelled by the star.
行星状星云
天文
词汇关系
上位词 1
词源
Coined by William Herschel because of their apparent resemblance to the planet Uranus.
来源：wiktionary