A. planet B. galaxy C. universe D. constellation 相关知识点: 试题来源: 解析 B。本题考查银河系相关的概念。选项A“planet”(行星)与银河系概念完全不同;选项B“galaxy”(银河系),我们的太阳系位于银河系中,符合题意;选项C“universe”(宇宙)范围太大,不准确;选项D“constellation”(星座)与银河系不...
小题3:推理题:根据第四段中“Earth’s galaxy is called the Milky Way”地球所在的星系叫银河系,常理可知星系是有很多星星组成的。故选C。小题4:推理题:根据第五段最后一句“The supermassive black hole at the center of the Milky Way galaxy has a mass equal to about four million suns and would ...
As noted, much of the Milky Way's arms is made up of dust and gas. This matter makes up a whopping 10-15% of all the "luminous matter" (i.e. that which is visible) in our galaxy, with the remainder being the stars. Our galaxy is roughly 100,000 light years across, and we ca...
But in 2022, as Space.com previously reported, researchers identified an unusual rocky object coming from the Oort cloud. When the objects in the Oort cloud interact with passing stars, dust clouds or even the weak gravitational tidal forces created by the Milky Way galaxy, they may spiral ...
When man began to search the skies,he saw a lot of things.In the universe,the earth seemed to be just a small 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,our galaxy.The Milky Way has about thirty ...
To best see the Lyrids, go to the darkest possible location, lean back and relax.(Image credit: Future) Historical Lyrid meteor shower sightings A Lyrid meteor crosses the Milky Way galaxy in this photo taken by Tina Pappas Lee on Fripp Island, South Carolina. The photo was taken at approx...
The second important reason is size—the universe is huge. "Tools like the Hubble Telescope(哈勃望远镜)have shown us that there are at least 100 billion galaxies, " says Shostak. "And our galaxy, the Milky Way, has at least 100 billion stars. Some planets going around these stars might ...
B. The centre of the Milky Way is far away from us. C. We can get a view from outside of the Milky Way. D. The astronomy today is not advanced enough.4. Which of the following is NOT mentioned in the passage as one of the ways we study our galaxy? A. Observation. B. ...
To best see the Lyrids, go to the darkest possible location, lean back and relax.(Image credit: Future) Historical Lyrid meteor shower sightings A Lyrid meteor crosses the Milky Way galaxy in this photo taken by Tina Pappas Lee on Fripp Island, South Carolina. The photo was taken at approx...
Any point is just as good as any other. This means the Big Bang happened everywhere throughout the universe simultaneously; it happened in the room you're sitting in, and it happened in the most distant galaxy we can see. The Big Bang was not a point in space; it was a location in...