Chapter 11:Small Bodies Orbiting the Sun

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Chapter 11Small Bodies Orbiting the Sun
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Kuiper Belt
The Kuiper Belt of comets spreads from Neptune
out 50 AU from the Sun
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Oort Comet Cloud
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Comets
A. icy dirtball?
or
B. dirty snowball?
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Composition of a Comet
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Composition of a Comet
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Comets lack tails until they enter the inner
solar system.
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Halleys Comet
Period of orbit is 74-79 years predicted by
Edmond Halley
Nucleus very dark
Dirty snowball!
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Halleys Comet
I came in with Halleys comet in 1835. It is
expecting to come again next year (1910), and I
expect to go out with it. The Almighty has said
no doubt Now here are two unaccountable
freaks they Came in together, they must go
out Together. - Mark Twain, a Biography
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Meteor Showers
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Meteor Showers
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Meteor Showers
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Meteroids

• meteroids chunks of matter in space orbiting in
  the Solar System ranging up to tens of meters
  across and sometimes larger
• meteors when these chunks hit the Earths
  atmosphere and show up as streaks in the sky
• meteorite when a fragment of a meteoroid
  survives its passage through the Earths
  atmosphere

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Meteorites
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Asteroids
Gaspra
Ida and its moon Dactyl
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Ceres was the largest Asteroid, now its a Dwarf
Planet
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Most asteroids orbit the Sun between Mars and
Jupiter
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The Extinction of Dinosaurs
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