Across
- 2. a spectrum used to study light
- 5. millions of billions of stars all together make a...
- 7. what caused stars and galaxies to form
- 10. waves on a lower frequency than a radio wave
Down
- 1. what all matter is composed of
- 3. the galaxy we live in
- 4. shared his theory or relativity
- 6. the first element on the universe
- 8. what created the universe
- 9. all matter and space that exists