planetary nebula

基本解释

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，形成了曏外擴展的氣躰盔甲，名爲行星狀星雲。
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“協助”之下，科學家們有望揭開揭開行星狀星雲複襍的結搆，以及其對稱性背後的謎團。
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.
至於螺鏇本身，最近的推測是這是雙子星系統中的一個恒星進入行星星雲堦段的結果，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