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Chapter 19
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dawrf planets
the family of icy worlds that orbit beyond Neptune in our solar system
Plutinos
Icy Kuiper belt objects that, like Pluto, are caught in a 3:2 orbital resonance with Neptune
Widmanstatten pattern
the bands in iron meterorites that appear because of the presence of large crystals of nickel-iron alloys
chondrite
a stony meteorite that contains chondrules
chondrule
a round, glassy body found in some stony meteorites. Chondrules are believed to have solidified very quickly from molten drops of silicate material
meteor shower
a multitude of meteors that appear to come from the same region of the sky and are believed to be caused by comet debris
s-type asteroids
rockey asteroids believed to be fragments from the crust and mantle
M-type asteroids
asteroids believed to be fragments form the metallic cores of differentiated asteroids
C-type asteroids
asteroids that are plentiful in carbon compounds and are more common in the outer asteroid belt
Oort Cloud
a swarm of icy bodies believed to lie in a spherical shell extending to 100,000 AU from the sun.
Scientists have advanced the hypothesis that this region is the source of
long period comets
gas tail (type I)
a comet tail composed of ionized gas atoms released from the nucleus and carried outward by the solar wind
dust tail (type II)
a comet tail composed of dust released from the nucleus and pushed away by the pressure of sunlight
coma
the glowing head of a comet
sublimation
the process of a solid going directly to a gas without becomiing a liquid first
Kuiper belt
the collection of icy planetesimals believed to orbit in a region from just beyond neptune out to 100AU or more
Author
eboustead
ID
148747
Card Set
Chapter 19
Description
Solar System Debris- Key terms and concepts
Updated
2012-04-20T02:27:58Z
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