Across
- 3. the farthest planet from the sun
- 4. Einsteins equation
- 6. what is the end result of the solar nebula?
- 7. how many years for solar systems to form?
- 8. planet most like Earth
- 11. the first celestial body
- 12. the pull that allows the objects in a solar system to rotate
- 13. the star that our solar system revolves around
- 14. planet with rings
Down
- 1. the theory that the universe is expanding from a center point
- 2. the part of the nebula that gains mass and compresses matter until nuclear fusion
- 5. the first atom and most abundant in the universe
- 9. what are stars surrounded by?
- 10. how many planets are in our solar system