GK
THE UNIVERSE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Galaxies are composed of (best answer)
|
|
stars
|
|
|
stars and gas
|
|
|
stars, dust, and gas
|
|
|
stars, dust, and gas held together by gravity
|
Explanation:
Detailed explanation-1: -A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity. We live on a planet called Earth that is part of our solar system.
Detailed explanation-2: -Our galaxy, the Milky Way, is typical: it has hundreds of billions of stars, enough gas and dust to make billions more stars, and at least ten times as much dark matter as all the stars and gas put together. And it’s all held together by gravity.
Detailed explanation-3: -Galaxies are composed of stars, dust and dark matter, all held together by gravity. Astronomers aren’t certain exactly how galaxies formed. After the Big Bang, space was made up almost entirely of hydrogen and helium.
There is 1 question to complete.