Across
- 3. Universe is full of them
- 4. Discovered CMB
- 5. when stars far off look red
- 6. lightest member of gas
- 7. Beginning of the universe
- 8. can be produced by natural gases
- 10. Everything
Down
- 1. Big bang evidence
- 2. when stars closer to you look bluer
- 9. Used to study light