Scientists and Solar System

3. not a planet, loose collection of gas, dust, and small rocky particles, "long-haired star"
4. 1543, Polish astronomer who believed Sun was the center of the universe, and that planets orbit in circles
6. 140AD, Egyptian scientist who said Earth is the center of the universe
9. fastest orbit, greatest temperature range
11. hottest planet, rotate backwards, day is longer than its year
12. largest planet, Roman king of the gods, Great Red Spot
14. a meteorite that has entered Earth's atmosphere, most burn up
15. only planet that can sustain life, HOME
16. 1920's, focused on "fuzzy patch" and discovered it was another galaxy
19. 1687, discovered gravity

1. Late 1500's, believed Earth-centered universe where all objects orbit the Sun, but Sun and Moon orbit Earth
2. 1609 published Laws of Planetary Motion after Brahe died
5. originally 9th planet, demoted to dwarf planet in 2006
7. meteoroids that have hit Earth's surface
8. 1609, first person to look at space through a telescope
10. not a planet, small rocky body that orbits in "belts"
13. only planet named after a Greek god, the god of the sky, rotates on side and made of methane gas
14. a chunk of rock or dust in space
17. most glorious rings in the solar system, named after Roman god of agriculture
18. "Red Planet", 2 moons Phobos and Deimos
20. named after the Roman god of the sea, methane gas makes blue, strongest winds