A. It has a supermassive black hole at its center. B. It is a spiral - shaped galaxy. C. All the stars in it are of the same age. D. It contains dust and gas clouds. 相关知识点: 试题来源: 解析 C。解析:银河系是一个巨大的星系,它的中心有一个超大质量黑洞,它是螺旋状星系,并且包...
a跟你聊天累~~~不聊了! Chats tired ~~~ with you not to chat![translate] aThere are approximately 100 million stars in the Milky Way. Which expression represents this number of stars? 有大约100百万个星用银河。 哪个表示代表星的这个数字?[translate]...
Planets Outnumber Stars in Milky Way, Astronomers SayWASHINGTON - The more astronomers look for other worlds, the morethey find that it's a crowded...Borenstein, Seth
we have learned a great deal since Drake first proposed his famous equation about the first four variables. Much of this is due to the recent spate of exoplanet discoveries, which have given astronomers a good idea of how many stars have planets, and how often...
An upcoming NASA mission could find that there are more rogue planets—planets that float in space without orbiting a sun—than there are stars in the Milky Way, a new study theorizes.
Nomad planets in Milky Way may outnumber stars and carry life Gravitational microlensing data suggest our galaxy may be awash with nomad planets, wandering in space far from host stars. Researchers at the Kavli Instit... S Bowler - 《Astronomy & Geophysics》 被引量: 0发表: 2012年 Galaxy ...
(宇宙), the earth seemed to be just a bit of dust. It is only a small planet, and travels around the sun. The sun together with its planets, travels in the Milky Way(银河), our galaxy(星系). The Milky Way has about thirty billion stars like our sun, an 人开始搜寻天空的母鸡,他...
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根据下文“For example, when an exoplanet moves between its star and us, it causes a small drop in the star’s brightness. Measuring this drop is the transit (凌日) method of discovery. NASA’S Kepler space telescope has discovered many exoplanets this way.”(例如,当一颗系外行星在它的恒星...
(1) Consisting of two things or parts; double. (2) Involving a choice between two alternatives. * The Milky Way contains numerous binary stars, each consisting of two stars orbiting each other. Binary has many uses, most of them in technical terms. Most computers, for example, are based ...