nebula formation
星雲形成
nebula observation
星雲觀測
nebula classification
星雲分類
horsehead nebula
[天文]馬頭星雲
orion nebula
獵戶座星雲；獵戶星雲
planetary nebula
行星狀星雲
reflection nebula
反射星雲
emission nebula
發射星雲
Extragalactic nebula is invisible to the naked eye.
我們用肉眼是看不到河外星系的。
A bit of mould is a pleiad of flowers;a nebula is an ant-hill of stars.
一粒黴菌是一簇美不勝收的花朵，一撮星雲是無數天體的蟻聚。
As our nebula began to collapse under its own gravity and spin faster, a dense clump of matter formed in the center. It's called a protostar.
當我們的星雲在自身重力作用下崩潰和更加快速地旋轉時，星雲中心形成了密集的物質塊。這叫做原恆星。
探索常見搜尋詞彙