Across
- 3. ours has 8 planets
- 6. a large cloud of gas & dust, such as the one that formed our solar system
- 8. smallest unit of the Universe
- 9. literally means "everything"
- 10. the theory that the Universe formed in a giant dramatic event
Down
- 1. the asteroid-like bodies that formed the building blocks of planets
- 2. a collection of billions to millions of stars
- 4. what planets revolve around
- 5. matter that does not interact with baryonic matter, itself, or light
- 7. a force causing the expansion of the Universe to accelerate