Galaxies are giant structures made of dust, gas, stars and other celestial bodies spread through an immense area of space. Our own galaxy, the Milky Way, consists of more than a hundred billion stars strung across tens of thousands of light years. Galaxies are broken down into three basic s...
What are galaxies?The Galaxies of the Local Group by Sidney van den Bergh, Cambridge Astrophysics Series; The Formation of Galactic Bulges eds C M Corollo, H C Ferguson and R F G Wyse, Cambridge Contemporary Astrophysics.BinneyJamesEBSCO_AspAstronomy & Geophysics...
The next time someone leaves you a message that you never want to lose, do yourself a favor. Take five minutes to back it up to at least three other locations, so you can enjoy listening to it whenever you want, forever. High Tech Toys Here are some of our favorite high-tech tools ...
Star clusters are large gravitationally bound groups of stars that are one of the best tools astronomers have to study stellar evolution.
B. Galaxies rotate. C. Galaxies are being rotated. D. Galaxies will rotate. 相关知识点: 试题来源: 解析 B。本题考查“星系旋转”的英语表达。A 选项“are rotating”是现在进行时,强调正在旋转;C 选项“are being rotated”是现在进行时的被动语态,不符合星系自然旋转的主动意义;D 选项“will rotate...
Related: How galaxies form: Theories, variants and growth Around 15% to 20% of galaxies with AGNs are bright in radiowaves and are classed as being "radio loud," according to the California Institute of Technology (Caltech). Quite what makes one AGN "radio loud" and another "radio quie...
The majority of bright early-type galaxies in this field are found at redshifts $z \\leq 1.3$ to share common properties with those of high-z cluster samples, as for the age and mass of the dominant stellar population -- which are found to be as old as 3-5 Gyr and as massive as...
12. How many galaxies are there in the universe? 13. What does a light-year mean? 14. Do you want to travel in space one day? Why or why not? 相关知识点: 试题来源: 解析 12. There are billions of galaxies in the universe. 13. A light-year is the distance that light tra...
Among early-type galaxies with almost circular isophotes, E0 and E1 galaxies are, at 99.3% significance, more luminous than face-on objects classified as S0(0) and S(0)(1). This result supports the view that rotation and "diskiness" are more important in the outer regions of faint early...
百度试题 结果1 题目What percentage of galaxies are irregular? A. 10% B. 25% C. 50% D. 75% 相关知识点: 试题来源: 解析 A 反馈 收藏