Lachlan's space crossword

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Across
  1. 2. circles a planet
  2. 4. a picture in the stars
  3. 7. when the sun blowes up
  4. 9. a metior in space
  5. 11. proxima Centauri b is one
  6. 12. closest gas giant
Down
  1. 1. a science subject about space
  2. 3. a cloud of dust
  3. 5. someone that esplores space
  4. 6. it's dark for 42 years
  5. 8. every planet is in
  6. 10. has no moons