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Across 3. Spacecraft on its way to Pluto that will arrive in 2015 4. Dwarf planet; plutoid, discovered near Easter, no moons 5. Most of a comet's material is in this 10. Family of asteroids most dangerous to earth. 11. Comets that orbit the sun in less than 100 years are called this 13. Supposedly the source of comets; hypothetical sphere of icy objects 14. Meteor that appears to break up violently 15. Extra spectacular meteor seen over wide area 17. Rock or dust orbiting the sun 22. Dwarf planet; 4 moons, polar ice caps, 17 degree tilt to orbit from ecliptic 23. Halley's comet should return in the year 20__ __ (spell out) 24. Long, glowing pieces behind a fireball 25. Photographs used to find asteroids; they look like streaks and stars don't 28. Time it takes for comet to go once around the sun; differs for each 30. Meteor shower seen every November 31. Two asteroids can orbit each other and so are called _________. 32. Comet tail may be __________ of miles long 33. Only dwarf planet in the asteroid belt. 35. Type I tail on a comet is mostly made of this

Down 1. Largest meteorite ever found; 66 tons 2. Location of most asteroids 6. Doughnut-shaped debris field past Pluto; hypothetical, some evidence for it. 7. Dwarf planet with rapid spin, spot, and oblong shape 8. Near Earth Asteroid Tracking 9. Group of asteroids with similar orbits and composition 11. Rarest type of meteorite 12. Can often be seen without a telescope; made of head and tail 16. Point in the sky from which meteors seem to come 18. Head of a comet is made of a nucleus and ___________ 19. Dwarf planets must have a nearly __________ shape. 20. Rock or dust entering earth's atmosphere 21. A dwarf planet cannot be one of these but can have one (or more) 26. meteor shower seen every August 27. Family of asteroids near Jupiter 29. Most common type of meteorite 34. Dwarf planet; largest; most distant