Astronomy - Solar System

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