Space

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Across
  1. 5. a person who travels beyond the earth's atmosphere
  2. 7. a science that deals with matter and energy
  3. 8. something that is related
  4. 9. coming from the stars
  5. 10. a galaxy other than the Mily Way
Down
  1. 1. a circular path
  2. 2. large group of stars
  3. 3. relating to the earth or its inhabitants
  4. 4. the configuration of stars
  5. 6. caused by heat