Sun-Moon-Earth

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Across
  1. 3. Completely illuminated
  2. 5. Increase
  3. 6. Phases lasting 27.3 days
  4. 8. Night Eclipse
  5. 9. Imaginary line
  6. 10. Decrease
Down
  1. 1. One object around another
  2. 2. Dark
  3. 4. Day Eclipse
  4. 7. Spin