Spanel Planetarium

Hubble's Law Quiz

Here are some fundamental questions regarding the expansion of the universe as described by Edwin Hubble.

1. What is the relationship between a galaxy's distance and its motion relative to us?

2. How old is the Universe?

3. Why does galaxy recession mean the universe is expanding?

4. What is meant by the cosmic scatter?

5. What led to the discovery that the galaxies are receding away from each other?