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Across
  1. 1. Our heat
  2. 2. Mostly water
  3. 3. Late stages of stars
  4. 6. Endless
  5. 8. Has an international version
  6. 9. Main way we enter space
Down
  1. 1. Generates minerals
  2. 4. Not quite a planet
  3. 5. An illuminated cloud of gas
  4. 7. Probe launched in 2012