Across
- 5. used the telescope to support the heliocentric model
- 6. the coolest part of the sun
- 8. the thin, middle layer of the sun
- 9. surface contains iron and oxygen (iron oxide)
- 10. gas ____, another name for the 4 outer planets
- 12. the center of the sun
- 16. the layer of the sun that we see
- 18. icy dirtball
- 19. helped Kepler disprove that planets moved in perfect circles
- 20. atmosphere consists of carbon dioxide making the surface very hot
Down
- 1. largest planet (10x that of Earth's diameter)
- 2. space rock that gets through Earth's atmosphere and hits Earth
- 3. eruptions of hot gas from the sun's surface
- 4. developed the heliocentric system
- 7. space rock that gets burned up in Earth's atmosphere
- 11. developed the geocentric system
- 13. all outer planets have moons and ____
- 14. smallest planet
- 15. proved the planets orbit was elliptical
- 16. sent out to learn more about our solar system and beyond
- 17. outermost layer of the sun's atmosphere