planetary nebula

基本解釋

Such stars eventually blow off the material of their outer layers, which creates an expanding shell of gas called a planetary nebula.
這樣的恒星最終炸開了它們的外層物質(zhì)，形成了向外擴展的氣體盔甲，名為行星狀星云。
And it is these that are helping scientists to resolve the outstanding mysteries of the complex shapes and symmetries of planetary nebula.
在圖片的“協(xié)助”之下，科學家們有望揭開揭開行星狀星云復雜的結(jié)構(gòu)，以及其對稱性背后的謎團。
As for the spiral itself, current supposition is that this is the result of a star in a binary star system entering the planetary nebula phase, when its outer atmosphere is ejected.
至于螺旋本身，最近的推測是這是雙子星系統(tǒng)中的一個恒星進入行星星云階段的結(jié)果，此時它的外層大氣會被噴出。

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