Earth Moon and Sun Vocab

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