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CD School House 9.0 - Wayzata Technology (1994).iso
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l06.dal
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1994-02-18
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1.6% argon, 0.6%
carbon monoxide, 0.15% oxygen, and 0.03% water vapor. Winds in the Martian
atmosphere reach speeds exceeding 300 km/h and, in so doing, raise vast
amounts of dust that can envelop the planet for weeks at a time.
$
JUPITER
Jupiter, the solar system's largest planet, is a colossal ball of hydrogen and
helium without any solid surface comparable to land masses on earth. In some
respects Jupiter is more like a star than a planet. Jupiter likely has a small
rocky core encased in a thick mantle of metallic hydrogen, which is enveloped
by a massive atmospheric cloak topped by a quilt of multi-colored clouds.
The windswept visible surface of Jupiter is constantly changing. Vast dark
belts merge with one another or sometimes fade to insignificance. Brighter
zones--actually smeard bands of ammonia clouds--vary in intensity and
frequently are carved up with dark rifts or loops called festoons.
Jupiter's rapid rotation makes the great globe markedly oval so that it
appears about 7% "squashed" at the poles. There is a ring of dust-sized
particles around the giant planet's equator. The ring appare