Earth, Moon, Sun Vocab

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