Across
- 2. - Danish nobleman astronomer
- 4. - Comet's return named after him
- 6. - Laws of planetary motion
- 9. - Improved the telescope
- 10. - "Cosmos" host and author
- 11. - Cataloged astronomical objects
- 13. - Discovered Uranus
- 14. - Heliocentric theory proponent
Down
- 1. - Geocentric universe advocate
- 3. - Saturn's ring discovery
- 4. - Expanding universe evidence
- 5. - Laws of motion and gravity
- 7. - Theory of relativity
- 8. - Apollo 13 mission commander
- 12. - Accurate celestial observations