Astronomy

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Across
  1. 3. A chunk of rock orbiting a planet
  2. 5. When the moon/sun is in shadow
  3. 10. The study of space
  4. 11. Big chunk of rock floating through space
  5. 12. Star in the centre of the solar system
  6. 14. A device used to look into space
  7. 16. An object orbiting another object
  8. 17. Going around the sun
  9. 18. seventh planet from the sun
Down
  1. 1. Forth planet from the sun
  2. 2. Closest planet to the sun
  3. 4. Furthest planet from the sun
  4. 6. Dwarf planet
  5. 7. third planet from the sun
  6. 8. The surroundings of a planet
  7. 9. A ball of rock/gas orbiting the sun
  8. 13. Biggest planet
  9. 15. Second planet from the sun
  10. 16. Known for its rings