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 Cepheus.
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 (...
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?
000 light-years and contains between100 billion and 400 billion stars. The Milky Way is so big that, over billions of years, its mass has captured numerous dwarf galaxies, which contain no more than a few billion stars, as satellites....
Do you know how many stars there are in the universe? The answer is MANY! Our sun is one of about 100 billion stars in our galaxy(星系), the Milky Way(银河系). But the Milky Way is just one of billions of galaxies that we know about! Some other scientists say there are 2,000,...
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...
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...
The Milky Way is estimated to be 13.2 billion years old, and is one of many billions ofgalaxies in the known universe. Other galaxies may be older and bigger, but as Earth’s cosmic address, the Milky Way has long fascinated humans. It was recognized by astronomers thousands of years ago...
The Sun Is Also a Star The sun is a star, just like the other stars we see in the evening sky. The difference is distance: The other stars we see arelight-yearsaway, while our sun lies only about eight light minutes away — many thousands of times closer. ...
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?