Earth moon and Beyond

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Across
  1. 4. The bending of light as it moves from one material to another
  2. 8. A grouping of gas, dust, and many starts, plus any objects that orbit those stars
  3. 9. A low, bowl shaped area on the surface of a planet or moon
  4. 11. An event that occurs when one object in space passes through the shadow of another object in space
  5. 12. One of the shapes the moon seems to have as it orbits Earth
  6. 13. Any natural body that revolves around a planet
  7. 15. To spin on an axis
  8. 16. An imaginary line that passes through Earth's center and its North and South Poles
  9. 17. The star at the center of our solar system
Down
  1. 1. A body that revolves around a star
  2. 2. Everything that exists, including such things as starts, planets, gas, dust, and energy
  3. 3. An imaginary line around Earth equally distant from the North and South Poles
  4. 5. A pattern of starts, named after a mythological or relgious figure , an object, or an animal
  5. 6. The path one body takes in space as it revolves around another
  6. 7. A huge ball of very hot gases in space
  7. 10. To travel in a closed path
  8. 14. A star and all the planets and other objects that revolve around it