1. ASTEROIDS
COMETS
METEOROIDS

2. Asteroids Most in the asteroid belt between Mars and Jupiter
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Left over planet materials
Most in the asteroid belt between Mars and Jupiter

3. Location: most lie between Mars and Jupiter

5. IDA

6. GASPRA

7. IDA & DACTYL

8. NEAR - Eros: Making Asteroid History: Feb. 2001
First orbit
First soft landing
First detailed study

9. The Surface of Eros

10. Comets “Snowy dirtballs” made of rock, ice, tar
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Comets
“Snowy dirtballs” made of rock, ice, tar
Earliest material in solar system.
Highly elliptical orbits.

11. Comet Hale-Bopp

12. Comets Nucleus, coma and tails. Ion tail points away from Sun.
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Nucleus, coma and tails.
Ion tail points away from Sun.
Tails grows as comet approaches Sun.

13. Orientation of a comet’s tail as it orbits the Sun
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DRAW

14. Meteoroids Small space rock moving through the solar system Sources:
Interplanetary Debris
Displaced Asteroid Debris
Old Comets

15. Meteoroids Most <1mm in diameter
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Most <1mm in diameter
Most burn up (as meteors) when entering a planet’s atmosphere
**Draw diagram on white board

16. Meteor An Meteoroid burning up in Earth’s atmosphere
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An Meteoroid burning up in Earth’s atmosphere
When many are burning= meteor shower

17. Meteorite
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Any part of a meteoroid that is left after it impacts the planet
Most are small

18. Meteor Crater, Arizona

19. STOP HERE