Universe

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Across
  1. 3. comet
  2. 5. keplar
  3. 9. telescope
  4. 10. copernicus
  5. 11. milkyway
Down
  1. 1. heliocentric
  2. 2. geocentric
  3. 4. satellite
  4. 6. ptolemy
  5. 7. exoplanet
  6. 8. period