Page 325 - 89 history of astronomy_opt

In 1844, assuming a circular orbit, and
a mean distance agreeing with Bode’s law,
he obtained a first approximation to the
position of the supposed planet. He then
asked Professor Challis, of Cambridge, to
procure the latest observations of Uranus
from Greenwich, which Airy immediately
supplied. Then the whole work was recal-
culated from the beginning, with more ex-
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