Across
- 4. noticed that all other galaxies were moving away from us
- 5. had the idea that the universe started from a single point
- 7. when was background radiation discovered
- 8. used to study starlight to see what makes up stars
- 9. which galaxies move faster, closer or father galaxies
- 10. a hypothesis that is supported by experimentation and observation
Down
- 1. is the universe homogeneous or heterogeneous
- 2. how long ago the universe started
- 3. a rule that correctly describes a natural phenomenon
- 6. something scientists still cannot figure out