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CD School House 9.0 - Wayzata Technology (1994).iso
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1994-02-18
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rings.
Titan, the largest of Saturn's satellites, is the only satellite in the solar
system with a substantial atmosphere, now known to be primarily nitrogen and
4.6 times as massive as earth's, with a surface pressure of 1.6 earth
atmospheres.
$
URANUS
Uranus was apparently unknown until 1781, when it was accidentally discovered
William Herschel with a 150-mm reflecting telescope.
Jupiter, Saturn, Uranus, and Neptune are rather similar in the sense that their
interiors consist mainly of hydrogen and helium and their atmospheres consist
of these same elements and simple compounds of hydrogen. Unlike the three other
giant planets, the axis of Uranus is tipped almost parallel to the plane of the
solar system. This means that we can view Uranus nearly pole-on at certain
points in its 84-year orbit of the sun.
Uranus has a substantial magnetic field tilted at a remarkably large angle of
some 60o to the rotation axis and nine main slender, dark rings with a tenuous
structure within the ring system.
$
NEPTUNE
The discovery of Neptune in 1846, after its existence in the sky had been
predicted from independ