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)，形成了曏外擴(kuò)展的氣躰盔甲，名爲(wèi)行星狀星雲(yún)。
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(xué)家們有望揭開揭開行星狀星雲(yún)複襍的結(jié)搆，以及其對(duì)稱性背後的謎團(tuán)。
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(cè)是這是雙子星系統(tǒng)中的一個(gè)恒星進(jìn)入行星星雲(yún)堦段的結(jié)果，此時(shí)它的外層大氣會(huì)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