Across
- 4. the study of stars and stuff
- 7. the radiation left over from the big bang
- 8. what we live in
Down
- 1. one way scientists predict the age of the universe
- 2. the amount of years since the bing bang
- 3. a model of the universe expanding/ I’m really hungry
- 5. the study of space
- 6. the theory of the compressed universe