Formation and motion of Galaxies # 2 Flashcards
1
Q
What is a galaxy?
A
A galaxy is a large group of stars, gas, dust, and dark matter held together by gravity.
2
Q
How do galaxies form?
A
Galaxies form from giant clouds of gas and dust that come together due to gravity.
3
Q
What are the types of galaxies?
A
The main types are spiral, elliptical, and irregular.
4
Q
What is special about spiral galaxies?
A
They have a flat, spinning disk with arms that spiral outward.
5
Q
What is galactic motion?
A
Galactic motion is how galaxies move through space.
6
Q
What is the Milky Way?
A
The Milky Way is the galaxy that contains our solar system.
7
Q
What happens when galaxies collide?
A
When galaxies collide, they can merge and form new stars.
8
Q
What is dark matter?
A
Dark matter is an invisible substance that makes up most of a galaxy’s mass.
