A. The sun is the largest star in the universe. B. The moon has no light of its own. C. Planets always move in a straight line. D. Stars are all the same size. 相关知识点: 试题来源: 解析 B。本题主要考查对科普知识的理解。A 选项,太阳不是宇宙中最大的恒星,错误。C 选项,行星的...
in a 2012 paper in the journalSolar and Stellar Astrophysics. This red hypergiant star was once estimated to be 1,800 to 2,200 times the width of the sun, but new measurements brought it down to size. However, some sources still list it as the largest star. ...
The largest known structure in the Universe is called the 'Hercules-Corona Borealis Great Wall', discovered in November 2013. This object is a galactic filament, a vast group of galaxies bound together by gravity, about 10 billion light-years away. What comes after a universe? So, in some ...
A. A star B. A planet C. A galaxy D. A moon 相关知识点: 试题来源: 解析 C。本题考查宇宙中天体大小的知识。A 选项“star”(恒星)比行星和卫星大,但没有星系大;B 选项“planet”(行星)小于恒星和星系;C 选项“galaxy”(星系)包含众多恒星和其他天体,是最大的;D 选项“moon”(卫星)通常比行星...
In the universe, as we all know, there are the Sun, the Moon, the Earth and many stars. Through our geography lessons, we know the Earth goes around the Sun and the Moon goes around the Earth. We have day and night because the Earth keeps turning all the time. 1 When our part...
Here is a table showing the largest stars in the universe, their average size (inSolar Radius), and what type of star they are: These stars are all truly massive, with sizes that are difficult to comprehend. Red supergiants and red hypergiants are the largest types of stars that we know...
The star that transforms into a red supergiant does so at a cost. It loses a large percentage of its mass out to space. As a result, while red supergiants are counted as the largest stars in the universe, they are not the most massive because they lose mass as they age, even as th...
七、阅读理解In the universe, as we know, there is the sun,the moon, the earth and many stars. Through our geography lessons, we know the earth goes round the sun, and the moon goes round the earth. We have day and night because the earth keeps turning all the time. When our par...
1.根据文中第二段第一行Just because the Moon is closer to the Earth than the Sun, it looks much bigger than the Sun可知。故选:D.2.根据文中第三行When our part of the Earth turns to the sun, It is day可知。故选:B.3. 根据文中第四段第一行There are many other planets in the ...
A12.Manreach the moon or any other star in the universe now,butwe get there years agoA.can;couldn'tB.are able to;weren't able toC.must;needn'tD.can;had to( N) 12. Man_reach the moon or any other star in the universe now, but we___get there years ago. A. can; couldn't...