planetary nebula
planetary nebula — 名詞
1. a large, bright cloud of gas in space that forms when a dying star pushes its ou
行星狀星雲
恆星死亡時噴出外層氣體形成的發光雲氣
a large, bright cloud of gas in space that forms when a dying star pushes its outer layers outward, leaving an extremely hot center that makes the gas shine
The Hubble telescope took a beautiful picture of a planetary nebula shaped like a giant eye.
哈伯望遠鏡拍下一張美麗的照片，內容是一個形狀像巨大眼睛的行星狀星雲。
collocation: take a picture of [planetary nebula]
Astronomers in Tokyo discovered a new planetary nebula in the northern sky last week.
東京的天文學家上週在北方的天空中發現了一個新的行星狀星雲。
collocation: discover a planetary nebula
When a star like our Sun runs out of fuel, it slowly turns into a planetary nebula.
像太陽這樣的恆星在燃料耗盡時，會慢慢變成一個行星狀星雲。
This planetary nebula looks like a ring of smoke expanding outward into space.
這個行星狀星雲看起來像一圈煙霧，正不斷向太空擴散。
Scientists study planetary nebulae to learn what elements stars create inside them.
科學家研究行星狀星雲，藉此了解恆星內部產生了哪些元素。
文法句型
a planetary nebula
planetary nebulae
用法筆記
Despite the name, a planetary nebula has nothing to do with planets. The term was chosen because these objects look round and greenish through a telescope, similar to how early astronomers saw the planet Uranus.