Across
- 3. Huge system of stars that formed after the universe began
- 4. cosmic microwave
- 6. all matter and space
- 8. Everything physical in the universe is made of this
- 9. The first and most common element
Down
- 1. The force that pulled matter together to form stars
- 2. start of the universe
- 5. Energy released in the early universe still detectable today
- 7. The universe growing