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Discovery
of Neptune
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Jupiter,
Saturn, Uranus, Neptune,
Pluto
-
Uranus
wasn't moving as expected
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1843
John Couch Adams used discrepancy to predict position of undiscovered planet
(Neptune)
-
1845
Le Verrier made same calculation
-
predicted
position within 1 degree of Adams'
-
English
observers hesitant to look for planet because didn't have a good map of
that part of the sky
-
Le
Verrier gave predicted position to Berlin observatory
-
Had
good maps
-
found
Neptune in one night
-
In
1613, Galileo probably saw it while observing Jupiter
-
didn't
pay much attention to it
-
Jupiter
moved past Neptune, Neptune was "lost" for 200 years
-
Neptune
moves only 2 degrees per year
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