Earth. Moon And Sun System

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