Across
- 2. the amount of mass in an object
- 3. Includes stars and solar system
- 6. what the universe is comprised of
- 7. an element represented as H
- 8. Used to study light
Down
- 1. Theory of the creation of the universe
- 2. the amount of matter in an object
- 4. all matter
- 5. and element represented as He
- 9. static over the airways