Across
- 7. caused by crack in the crust of a planet
- 8. gas cloud that surrounds the nucleus of a comet
- 10. large chunk of rock or metal that orbits the Sun
- 11. curved path of one object around another object in space.
- 12. piece of rock or metal that falls on a planet or moon's surface
- 16. small planet-like objects that orbit the Sun and share their orbits with similar objects
- 17. long ribbon-like trail of comet dust and gas
Down
- 1. lump of ice, frozen gas, and dust that orbits the Sun
- 2. the Sun and all the objects that orbit the Sun
- 3. head or solid part of the comet
- 4. round hole on the Moon’s surface.
- 5. broad, flat plain on the Moon’s surface.
- 6. small piece of rock or metal that travels through space
- 9. rock or metal that enters the Earth's atmosphere
- 13. flattened circle or oval.
- 14. natural or artificial objects orbit another body in space.
- 15. cloud of gas or dust in space.