Thegalaxyis surrounded by a huge hot-gas halo that is several hundreds of thousands of light-years in diameter. Astronomers estimate that the halo's mass is about the same as that of all the stars in the Milky Way. Many of the Milky Way's stars, however, are tough to view. That is...
1. How many stars are there in the Milky Way? 2. Why can't we see the Pistol Star? 3. Which is closer to the earth, the Pistol Star or the sun? 4. What can decide a star 's colour? 5. What has happened when a star becomes red? 6. Translate the last sentence into Chinese...
What years did Halley's Comet appear? How many galaxies are in the Virgo Supercluster? How old is the Sikhote-Alin meteorite? What property is common to all spiral galaxies? What shape do irregular galaxies have? What is the elliptical galaxy that is closest to the Milky Way?
How far away is the Sombrero Galaxy? What is Halley's Comet farthest distance from the sun? How far has Hale-Bopp traveled from the sun? How far above the Earth does the Hubble Telescope orbit? How many light years is the Oort cloud from Earth?
In fact, that will be the fate of our own sun in roughly 5 billion years. But how quickly does the night sky change, and in our galaxy, the Milky Way, how many stars die each year? According to James De Buizer, a research scientist at the Search for Extraterrestrial Intelligence (...
3.What do we use to work out how far away a star is from the earth?4.How many stars are there in the Milky Way?5.What does "Milky Way" mean in Chinese?第3个 e have light-years `` 答案 1.the sun together with its planets,travels in the Milky Way2.the earth seemed to be...
B. It has 100 billion galaxies. C. It is unimaginably big. D. It has as many galaxies as the Milky Way. 相关知识点: 试题来源: 解析 C 文章第一句就提出宇宙大的人类根本无法想象,原句为It is just about impossible to imagine how big the universe is,故选C。 反馈 收藏 ...
The difference is distance: The other stars we see are light-years away, while our sun lies only about eight light minutes away — many thousands of times closer. Officially, the sun is classified as a G2 type star, based on its temperature and the wavelengths or spectrum of light ...
Visible light is light that can be perceived by the human eye. When you look at the visible light of the sun, it appears to be colorless, which we call white. It is made up of many color frequencies. The combination of every color in the visible spectrum produces a light that is colo...
constellations as well. This is not the core of the Milky Way galaxy, but it is still a noticeably dense region of stars that creates a faint band of light from a dark sky. The photo below shows the Cygnus region of the Milky Way along with many other northern constellations such as ...