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