Across
- 2. Used to study light
- 3. 73% H 25% He 2% everything else
- 6. Theory that the universe is constantly expanding
- 9. Wilson & Penzias, heard this over air waves when working on a radio
- 10. Theory of relativity
Down
- 1. During the beginning the universe was full of
- 4. 5 billion years
- 5. First atom
- 7. Theory that galaxies are moving apart from each other
- 8. First subatomic particle