vocab

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Across
  1. 4. when a object travels around another.
  2. 5. The study of space
  3. 7. a hole in the surface of a planet or moon caused by a rock from space hitting the surface.
  4. 10. a force that pulls objects towards the earth, planets, or moons
  5. 11. Everything in space as a whole
  6. 12. A planets spin on its axis.
Down
  1. 1. theory that states the sun is the center of the solar system.
  2. 2. A person who studies space
  3. 3. The path of an object around another object in space
  4. 6. Theory that earth was the center of the universe.
  5. 8. An imaginary line going through the center of a sphere's north and south poles.
  6. 9. a device to make distant objects appear much closer.