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

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Presentation transcript:

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

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

Meteorites

Stony Meteorites

Asteroid Belt

Asteroid Figure 26-16

Asteroids Asteroid Gaspra versus Mar’s moons Pheobos and Diemos

Suspicious Asteroid Dactyl

“Open the Pod Bay Doors, Hal.”

America From Space

Crater Remnant From Space

Meteor Crater, Arizona

Impact Site, Austrialia

Impact Site, Siberia

Ancient Impact Site

Ancient Impact Crater

Twin Impacts in Canada

Dinosaur Killer

Dinosaur Killer Beneath Gulf of Mexico

Meteor Shower Radiant

Comet Hyakutake 1996

Meteor Showers

Table 26.1 Meteor Shower Dates and Comet Coincidences

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

Cometary Origins The Oort Cloud

Comet Capture

Multiple Impact Site

Comet Shoemaker-Levy 9

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

Icy Meteorites (Comets)

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)

Hale Bopp

Comet Tail Evolution

Comet Halley Nucleus and Chemical Composition

Comet Discovery

Web Resources Comet Observations Minor Planet Center Satellite Tracking Information