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Across 1. This object is unpredictable. 9. is in the outer part of the solar system. It is believed to have thousands of comets.(3 words) 11. a massive object that will explode in a few billion years. 12. The fifth largest moon in the solar system. 14. This planet is tilted 98 degrees causing 42 years of winter and summer. 15. A dwarf planet in the asteroid belt. 16. Has beautiful rings. 17. Jupiter is around 1000 larger than _______.

Down 2. There are approximately 170 billion ___________ in the observable universe. 3. _________ was once a planet. 4. Has the strongest winds in the solar system. 5. this object sucks up anything in reach. (2 words) 6. An object that is believed to have wiped out the dinosaurs. 7. This planet has pretty much no atmosphere. 8. 1 of the 4 gas giants.On this planet hot hydrogen rises and cold falls. 10. ____________is america's space agency. 12. A planet that holds an alien life-form in stories. 13. Has the highest temperature in the solar system.