Across
- 2. The galaxy our solar system is in.
- 5. Discovered 4 moons orbiting Jupiter with telescope.
- 6. What do astronomical units measure.
- 7. Shooting star.
- 10. Outer planets are made mostly of.
- 12. Space rock that makes it to earth's surface.
- 13. Proposed geocentric model.
Down
- 1. First proposed heliocentric model.
- 3. Found in belt between Mars and Jupiter.
- 4. Sun centered solar system.
- 7. The red planet.
- 8. Inner planets are made mostly of.
- 9. Earth centered solar system.
- 10. Why planets orbit the sun.
- 11. Proposed elliptical orbit of planets.