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CD School House 9.0 - Wayzata Technology (1994).iso
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1994-02-18
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ent calculations by Leverrier in France and Adams in
England, was regarded as the crowning achievement of Newton's theory of
universal gravitation. Actually Neptune had been seen--but mistaken for a
star--several times before its "discovery."
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.
Neptune's large moon Triton is smaller than earth's moon. Spectral studies
indicate that the surface of Triton may be rocky, with methane glaciers and
a shallow seal of liquid nitrogen.
$
PLUTO
Pluto, the most distant known planet, was discovered at the Lowell Observatory
in 1930 as a result of an extensive search started two decades earlier by
Percival Lowell. The faint star-like image was first detected by Clyde
Tombaugh by comparing photographs taken on different dates.
In 1978 James W. Christy detected an elongation of Pluto's image on some of the
photographs that has been confirmed as a large satellite revolving identically
to the planet's rotation