chapter 4 Earth and Space

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Across
  1. 7. Any of the four planets in our solar system beyond Mars.
  2. 9. Any of the four closest planets to the sun.
  3. 11. One full orbit around the sun.
  4. 13. An object that orbits another object in space.
  5. 15. One whole spin of an object on its axis.
Down
  1. 1. A large round object that orbits around the sun, but has not cleared the path around its orbit.
  2. 2. A natural object that revolves around a planet.
  3. 3. A rocky mass up to several hundred kilometers wide that revolves around the sun.
  4. 4. A spacecraft that gathers data without a crew.
  5. 5. A medium-sized star that is at the center of our solar system.
  6. 6. A large, round object that revolves around a star and has cleared the region around its orbit.
  7. 8. The path an object takes as it revolves around a star, planet, or moon.
  8. 10. A group of stars, that forms a pattern.
  9. 12. Gigantic balls of very hot gases that give off radiation.
  10. 14. The force that attracts an object toward the center of earth, or toward any other body.