Planetary nebula: The Helix Nebula This is composed of expanding gas that was blown off by a star as it collapsed to a white dwarf. (Image credit: NASA, ESA, J. Hester, A. Loll (ASU)) Supernova remnant: The Crab Nebula Exactly as the name says, this is all that remains of a ...
A ___ is a large group of stars. A. constellation B. nebula C. galaxy D. star 相关知识点: 试题来源: 解析 C。本题考查天体词汇含义。A 选项“constellation”指星座;B 选项“nebula”是星云;C 选项“galaxy”星系是由大量星星组成的;D 选项“star”是星星。反馈...
The Orion is a famous ___. A. nebula B. galaxy C. constellation D. star 相关知识点: 试题来源: 解析 C。这道题考星座词汇。A 选项“nebula”是星云;B 选项“galaxy”是星系;C 选项“constellation”是星座,猎户座是著名的星座;D 选项“star”是星星。反馈...
A shooting star is actually a ___. A. meteor B. nebula C. quasar D. galaxy 相关知识点: 试题来源: 解析 A。本题考查宇宙天体相关的词汇。流星实际上是流星体,选项 A meteor 是流星的意思。选项 B nebula 是星云;选项 C quasar 是类星体;选项 D galaxy 是星系。反馈...
The Orion Nebula is a perfect example of a star-forming region or “stellar nursery”. Planetary Nebulae When early astronomers observed these round, compact nebulae in the night sky – they thought that they must be planets. In reality, planetary nebulae have nothing to do with planets. ...
A nebula, named for the Greek word for ‘cloud,’is in fact an interstellar cloud of dust and gas.Like the clouds in the sky, nebulae come in interesting shapes like flowers, insects, animals or people.This is how many of them get their names.There are four main types of nebulae....
Planetary Nebulae are created when a star comes to the end of its life. When the star collapses, it might not explode like a supernova but expand and die like theRing Nebulain the constellation ofLyra. The Ring Nebula and many others will contain a white dwarf at the centre. Ref:Univers...
A ___ is a huge cloud of gas and dust in space. A. star B. planet C. nebula D. meteoroid 相关知识点: 试题来源: 解析 C。星云(nebula)是太空中巨大的气体和尘埃云。星星(star)是发光的天体;行星(planet)是固体天体;流星体(meteoroid)是较小的天体碎片。反馈 收藏...
A planetary nebula is a phenomenon that occurs when a small to medium star approaches the end of its life cycle. The first one was...
Star144 Nebula is a WordPress theme framework that focuses on enhancing development. The core features of Nebula make it a powerful tool for designing, developing, and analyzing WordPress websites consistently, yet its deliberately uncomplicated code syntax also serves as a learning resource for progra...