Earth, Moon and Sun Glossery

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