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Across
  1. 2. heat
  2. 3. way we enter space
  3. 7. minerals
  4. 9. launched in 2012
  5. 10. Planet
  6. 11. stages of stars
Down
  1. 1. one
  2. 3. water
  3. 4. illuminated cloud of gas
  4. 5. an international version
  5. 6. Giant
  6. 8. quite a planet