Earth moon and sun Crossword

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Across
  1. 2. a moon phase that looks like a half a circle from earth
  2. 3. the sun the planets that orbit the sun and other objects that orbit the sun
  3. 5. the relative slice of things
  4. 8. something we observe to be similar over and over again
  5. 11. a moon phase that looks like a full circle from earth
  6. 12. a moon outside our solar system
  7. 13. the shape of the illuminated part of the moon as it appears from the earth
  8. 15. a moon phase that looks like less than half a circle from earth
  9. 16. the nearly circular path a smaller object (like the moon) travels around a larger object (like earth)
  10. 17. to shine light on an object and make it visible
Down
  1. 1. the amount of time it takes for a planet to complete one orbit around a star or stars
  2. 4. the star that is the main source of light at the center of our universe
  3. 6. when the moon is completely dark
  4. 7. a moon phase that looks like more than a half circle from earth
  5. 9. a planet outside our solar system
  6. 10. the border between light and dark on the moon.
  7. 14. on object,diagram or computer program that helps us understand something by making simpler or easier to see
  8. 18. moon a moon phase that in which the moon is not visible from earth