1. Debris Asteroids Comets All can potentially become meteorites (shooting stars) The solar system’s very own “left-overs.”

2. Pockets form from intense heat of entry into our atmosphere Iron Meteorite

3. Meteorites

4. Stony Meteorites

5. Asteroid Belt

6. Asteroid Figure 26-16

7. Asteroids Asteroid Gaspra versus Mar’s moons Pheobos and Diemos

8. Suspicious Asteroid Dactyl

9. “Open the Pod Bay Doors, Hal.”

10. America From Space

11. Crater Remnant From Space

13. Meteor Crater, Arizona

14. Impact Site, Austrialia

15. Impact Site, Siberia

16. Ancient Impact Site

17. Ancient Impact Crater

18. Twin Impacts in Canada

19. Dinosaur Killer

20. Dinosaur Killer Beneath Gulf of Mexico

21. Meteor Shower Radiant

22. Comet Hyakutake 1996

23. Meteor Showers

24. Table 26.1 Meteor Shower Dates and Comet Coincidences

25. Kirkwood Gaps Resonances with the Orbit of Jupiter Figure 26-12

26. Cometary Origins The Oort Cloud

27. Comet Capture

28. Multiple Impact Site

29. Comet Shoemaker-Levy 9

30. Comet Impact Comets are likely responsible for bringing the materials necessary for life to evolve on earth. (water, ices and organic molecules)

31. Icy Meteorites (Comets)

32. A Tale of Tails I. Gas Tail Points Away From The Solar Wind (charged particles, ions) II. Dust Tail Points Along The Orbital Path (neutral debris, dust)

33. Hale Bopp

34. Comet Tail Evolution

35. Comet Halley Nucleus and Chemical Composition

36. Comet Discovery

37. Web Resources Comet Observations http://encke.jpl.nasa.gov Minor Planet Center http://cfa-www.harvard.edu/cfs/ps/mpc.html Satellite Tracking Information http://liftoff.msfc.nasa.gov/academy/rocket_sci/satellites http://www2.satellite.eu.org/sat/vsohp/satintro.html