The Oort Cloud

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Across
  1. 4. Large rocky object that is portrayed to hit the Earth in many movies
  2. 5. A circular belt of celestial objects including many dwarf planets like Pluto
  3. 7. Large mass of rock and ice that typically travels in an elliptical orbit around the sun, characterized by its tail.
  4. 8. The center of our solar system
  5. 9. Our galaxy
Down
  1. 1. A force of attraction relating to the mass of an object that all matter possesses
  2. 2. A revolution around an object
  3. 3. Massive spherical group of celestial objects around the solar system
  4. 6. Describing an oval shape