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]...
Gravitational microlensing data suggest our galaxy may be awash with nomad planets, wandering in space far from host stars. Researchers at the Kavli Institute for Particle Astrophysics and Cosmology estimate there may be up to 100 000 such planets in the Milky Way alone and they may hold life....
Exoplanets (外行星): The Hunt Is OnToday scientists believe that planets could outnumber the stars. For centuries, scientists and natural philosophers have proposed that stars in the night sky have planetary systems similar to our own solar system. The existence of extrasolar planets, or exoplanets...
N is the number of civilizations with which we could communicate R* is the average rate of star formation in our galaxy fp is the fraction of those stars which have planets ne is the number of planets that can support life fl is the number of planets that will develop life ...
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 ...
So far, only a small part of our galaxy, the Milky Way, has been explored. 2 Because exoplanets are so far away and very close to stars, it is very difficult to see them directly. 3 For example, as a planet circles a star, it pulls on it and causes it to shake. As the ...
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.
aThere are more than 200 billion stars in our galaxy,called the Milky Way,and our Sun is only one of them. 正在翻译,请等待... [translate] achoose miner's mine from the build menu and build ti in the village 从修造菜单选择矿工的矿并且修造钛在村庄 [translate] a我信任你,但是这跟...
Also for the five yet unidentified X-ray pulsars in the SMC we propose emission-line stars as counterparts. This more than doubles the number of known high mass X-ray binary systems in this nearby galaxy. The spatial distribution of the new candidates is similar to that of the already ...