Across
- 2. This ancient astronomer set up a geocentric model of the solar system.
- 5. This Greek astronomer explained eclipses and moon phases.
- 6. This 20th century astronomer determined the universe is expanding.
- 8. This English astronomer explained orbital motion.
- 9. This modern science educator founded the Planetary Society.
- 11. This Scottish astronomer was the first to discover white dwarf stars.
- 12. This German astronomer determined that planets travel in elliptical orbits.
- 13. This American astronomer worked as a human computer at Harvard.
- 14. This Polish astronomer suggested a heliocentric view.
Down
- 1. This Italian astronomer discovered 4 of Jupiter's moons.
- 3. This astrophysicist was from Roanoke, Virginia.
- 4. This English/German astronomer trained his sister in astronomy.
- 7. This American astronomer predicted solar eclipses.
- 10. This German/American physicist suggested a space/time link.