Across
- 4. The category name for the inner four planets that have rocky surfaces
- 5. More of this means that gravity is stronger
- 6. Type of star that can end its life cycle as a neutron star or a black hole
- 8. A former planet that's furthest from the sun
- 9. The process that produces energy in the sun's core
- 11. The spinning of Earth on its axis
- 13. Less of this means that gravity is stronger
Down
- 1. The orbiting of Earth around the sun
- 2. The first phase of the moon cycle
- 3. The category name for the outer four planets that are made of gas
- 7. Eclipse that happens during the day
- 10. Eclipse that happens at night
- 12. Type of star that ends its life cycle as a white dwarf