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Chapter 7
The Jovian Planets:
Windswept Giants
term:
Cassini's division
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definition:
The major division in the rings of Saturn.
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term:
Galilean satellites
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definition:
Io, Europa, Ganymede, and Callisto: the four
major satellites of Jupiter, discovered by Galileo
in 1610.
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term:
giant planets
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definition:
Jupiter, Saturn, Uranus, and Neptune; or even
larger extrasolar planets.
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term:
Great Dark Spot
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definition:
A giant circulating region on Neptune seen by
Voyager 2 in 1989; it has since disappeared.
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term:
Great Red Spot
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definition:
A giant circulating region on Jupiter.
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term:
jovian planet
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definition:
Same as giant planets.
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term:
Roche limit
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definition:
The sphere for each mass inside of which blobs
of gas cannot agglomerate by gravitational
interaction without being torn apart by tidal
forces; normally about 2.5 times the radius of a
planet.
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