Greek and latin bases

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Across
  1. 2. space rock
  2. 5. thirsty
  3. 6. person who studies stars
  4. 9. object to make observations larger
  5. 10. optical instrument with changing symmetry
  6. 12. upright pipe in street for drawing water
Down
  1. 1. therapy in water
  2. 3. subject where you study stars
  3. 4. look in all directions
  4. 7. medical device
  5. 8. used in a submarine
  6. 11. person who travels in space