open cluster

基本解釋

Hence, it is rare that an open cluster survives long enough for one of its members to form a planetary nebula.
因此，一個(gè)疏散星團(tuán)很少能夠存活到它內(nèi)部的某個(gè)成員變成行星狀星云。
The stars will win in the end, destroying their pillars of creation over the next 100, 000 years, and resulting in a new open cluster of stars.
恒星將取得最終勝利，接下來(lái)的10萬(wàn)年恒星將摧毀它們的創(chuàng)造之柱，結(jié)果形成一個(gè)新的疏散星團(tuán)。
When the watercolor-like cloud surrounding the open cluster of stars was first observed, it was thought to be leftover material from the formation of the cluster.
這種圍繞在恒星疏散星團(tuán)周圍的水彩狀氣體云是第一次被觀測(cè)到，一般認(rèn)為這種氣體云是恒星群形成后的剩余物質(zhì)。

But at a nearby school, we are shown what Calacharo says is the norm, a small cluster of putrid open-pit latrines made of mud bricks worn to mere shells by rain and lack of repair.
NPR: The Missed Education of African Girls
Opening the tailgate with its integrated rear light cluster reveals supplementary lights to warn approaching vehicles of the open tailgate.
ENGADGET: Mercedes-Benz GLA concept puts laser projectors in headlights, redefines SUV