Earth, Moon, And Sun crossword

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