NS Primary

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Across
  1. 7. Distance light travels in one year
  2. 8. Closest planet to the Sun
  3. 9. Imaginary line through the center of a planet around which it rotates
  4. 10. Tool used to observe distant planets and stars
  5. 13. Bowl-shaped depression caused by impacts on a planet or moon
  6. 16. Path that a planet or satellite follows around a star or planet
  7. 17. Shooting star that enters Earth's atmosphere
  8. 18. Vacuum beyond Earth's atmosphere
  9. 19. Spinning of a planet on its axis
  10. 21. The star at the center of our Solar System
  11. 22. Imaginary line around the middle of a planet
  12. 23. Force that attracts objects toward each other
  13. 26. Our home planet, third from the Sun
  14. 27. Once considered the ninth planet, now a dwarf planet
  15. 28. Eighth planet from the Sun, known for strong winds
  16. 29. Period for a planet to complete one rotation
  17. 30. Circular structures of ice and rock around some planets
Down
  1. 1. Icy body that develops a tail when near the Sun
  2. 2. The Red Planet with iron oxide on its surface
  3. 3. Layer of gases surrounding a planet
  4. 4. Seventh planet from the Sun, tilted on its side
  5. 5. Measure of how hot or cold a planet is
  6. 6. Largest planet in the Solar System
  7. 11. Movement of a planet around the Sun
  8. 12. Sixth planet from the Sun, famous for its rings
  9. 14. The galaxy that contains our Solar System
  10. 15. Sun and all objects that orbit it
  11. 17. Earth's natural satellite
  12. 20. Time taken for a planet to complete one orbit around the Sun
  13. 23. System of stars, dust, and gas bound by gravity
  14. 24. Small rocky body orbiting the Sun, mainly between Mars and Jupiter
  15. 25. Second planet from the Sun, often called Earth's sister