Across
- 3. Everything that exists
- 4. A gigantic mass of stars
- 5. The kind of nuclear reaction which gives the sun its energy
- 8. The force that pulls on large objects
- 9. The tendency for an object to keep moving once it's in motion
- 10. An object which orbits another
Down
- 1. The result of momentum and gravity combined
- 2. About 70% of the sun
- 6. When the moon moves into the Earth's shadow
- 7. What the tilted axis gives us