Astronomy Crossword

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Across
  1. 3. Earth Centered model
  2. 6. Tool to observe stars
  3. 8. Discovered planetary motion laws
  4. 10. first to use a telescope for astronomy
Down
  1. 1. Sun centered system
  2. 2. Explained gravity
  3. 4. Group of Stars in a pattern
  4. 5. Proved universe is expanding
  5. 7. Proposed heliocentric theory
  6. 9. North star