Astronomy

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