Across
- 1. the atmosphere a comet is called this
- 4. The sunrise on this planet looks like it happens twice a day
- 7. This is the big thick bubble around the solar system
- 8. One criteria for planets is that they are ___ in shape
- 11. This is the name of the giant storm on Jupiter
- 14. This planet would float in a bathtub
- 15. This Mars rover's goal is to look for signs of ancient life
- 16. ___ every 29.5 years we can't see Saturn's rings from earth
- 18. The could on Venus are made up of this toxic compound
- 20. Scientists believe that the objects in the Kuiper belt are the ____ from the formation of the solar system
- 21. The discovery of this dwarf planet led to changes in the definition of planets.
- 23. This planet is the only dwarf planet located between Mars and Jupiter
- 25. Mars and ___ can occasionally knock an asteroid out of orbit and towards earth
Down
- 2. By studying these we can learn about the early conditions in our solar system
- 3. Our sun is this type of star
- 5. ___comets originate in the Oort Cloud
- 6. This planet was declassified as a planet in 2006
- 9. This planet was predicted before it was discovered
- 10. The Kuiper belt looks like a puffed-up ___
- 12. On this planet a day is longer than a year
- 13. This chemical compound makes some planets blue in color
- 17. Neptune is the ___ faster than the speed of sound
- 19. The oxidation of the iron in rocks would make them look this color
- 22. This planet has a unique sideways rotation
- 24. Earth is the only planet with liquid ___ on its surface