Is stuff in space evenly spaced out?

What do you use to find distance/locations?

Parallax

Triangulation

Distances
1. Small
2. Medium
3. Large

What did they often use as reference points?

What is it called when stars group together?

What is a smaller cluster called?

What is a larger cluster called?

What are Galaxies made of?

What are the 3 types of Galaxies?

What is the Doppler shift?

Who found out that the universe was expanding?

Quasars

Gamma Ray Burst

Missing Mass

What are the top 4 things that affect the earth?