Across
- 4. A meteoroid that has entered Earth's atmosphere
- 6. A meteoroid that has hit Earth's surface
- 7. A scientist who studies the universe beyond Earth
- 8. The attractive force between two objects
- 9. The path of an object as it revolves around another object in space
- 11. Planets Four inner planets
- 12. The study of the moon,stars,and other objects in space
- 13. A ball of rock,ice,and cosmic dust
Down
- 1. A chunk of rock or dust in space
- 2. Earth Centered Model
- 3. Any object that revolves around another object in space
- 5. Belt The region of the solar system between the orbits of Mars and Jupiter
- 7. Objects that revolve around the sun that are too small to be considered planets
- 8. Giants Name given to the four outer planets
- 10. Sun Centered Model