Vocabulary

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Across
  1. 4. When an object travels around another.
  2. 5. The study of space beyond our atmosphere.
  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 toward the center of the Earth, other planets or moon.
  5. 11. Everything in space as a whole.
  6. 12. A planet 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 the 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 used to make distant objects appear much closer.