The universe is expanding and every galaxy is moving away from every other galaxy.Astronomers believe that the universe began fifteen thousand million years ago.There areone hundred thousand million galaxies in the universe.Some astronomers believe that theuniverse will stop expanding,and the galaxies ...
The universe is expanding and every galaxy is moving away from every other galaxy. Astronomers believe that the universe began fifteen thousand million years ago. There are one hundred thousand million galaxies in the universe. Some astronomers believe that the universe will stop expanding, and the...
the universe D. the sun 2. Why does the moon look bigger than the stars? A. Because in fact the moon is bigger than the stars. B. Because the moon is father from the earth than the stars. C. Because the stars is nearer our earth than the moon. D. Because we are closer to ...
The Milky Way is only one galaxy among a few hundred million galaxies in our universe (each with hundreds of billions of stars). Galaxies are huge groupings of stars, planets, gas and dust. Our sun is in the Milky Way, which measures about 100,000 light years across. That long thin ...
It was the firsttime for Chinese to have a space travel.根据短文内容,选择正确答案。46. When our part of the earth turns to,t'sday.A. the moonB.thestarsC. the universeD.thesun47. Why does the moon look bigger than thestars?A. Because in fact the moon is bigger thanthe stars.B....
A light-year is 5,878,625,373,183.608 miles. Therefore, the centre of the Galaxy is very, very far away. Galaxy vs. Universe A Solar System is the smallest of the three subject matter. It covers the area of a Star's Heliosphere. Inside is the star and all the orbiting Planets, ...
We should not think of the universe in the same way. The universe doesn't have an outer perimeter, and nothing exists outside it, because there isn't an outside. As an analogy, consider the shape of our galaxy, the Milky Way. We can infer that it is a spiral based on maps of th...
Our Galaxy Is One of Millions in the Universe
A galaxy is a group of billions of stars orbiting a common centre. Many of these stars have planets orbiting them.If you can believe it, the universe is even bigger than that! Outside our galaxy are billions of other galaxies.The universe is huge!universe n. 宇宙neighbourhood n. 邻里...
Well, we don’t know, but it is something for you to ponder tonight when you look up at the sky again. Hopefully, humanity is still at the beginning, and we’re learning a tiny bit more about the universe every day – one day, we ...