Seasons

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Across
  1. 4. One of the shapes of the Moon visible from Earth
  2. 6. The study of space, celestial bodies, and the universe
  3. 7. An imaginary line through Earth that it rotates around
  4. 9. Relating to the Moon
  5. 12. The imaginary line dividing Earth into northern and southern hemispheres
  6. 13. Earth's natural satellite
  7. 15. The path one object takes around another in space
  8. 16. The spinning of Earth on its axis
  9. 17. The star at the centre of our solar system
  10. 18. When the Sun is at its highest or lowest point in the sky at noon
Down
  1. 1. The phase when the Moon is fully lit up as seen from Earth
  2. 2. The force that attracts objects towards each other
  3. 3. Caused by Earth's tilt as it orbits the Sun
  4. 5. When day and night are of equal length
  5. 8. Relating to the Sun
  6. 10. The movement of Earth around the Sun
  7. 11. The phase when the Moon is not visible from Earth
  8. 12. When one celestial body blocks light from another
  9. 14. The planet we live on