The Sun-Earth-Moon System

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Across
  1. 1. when the Sun rises over the horizon
  2. 3. the imaginary line that travels through the Earth
  3. 4. the study of space
  4. 5. summer, spring, winter, fall
  5. 6. traveling around something else
  6. 8. a representation of something else
  7. 11. the Earth's only natural satellite
  8. 13. the Earth has this type of rotation
  9. 15. the path something follows in space
  10. 16. there are 24 ________ in a day
  11. 17. when the Sun dips below the horizon
Down
  1. 1. dark shape that is produced when light is blocked
  2. 2. when the Sun is highest in the sky
  3. 7. a tool used by astronomers to look at light in space
  4. 9. where the sky and land meet
  5. 10. spinning on its axis
  6. 12. the first space-based optical telescope
  7. 14. the planet we live on
  8. 18. the center of our solar system (gives us heat)