Across
- 1. year a measurement unit for space
- 6. infinite space
- 7. space and matter just appeared
- 9. hits earths surface
- 10. theory the earth was the center of the solar system
- 11. shines bright at night
- 12. it enters earths atmosphere
Down
- 2. theory the sun was the center of the earth
- 3. the universe was created by a singularity
- 4. god made earth and matter
- 5. becomes visible
- 8. tail is more visible when it gets close to the sun