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The existence of the object was then for the first time officially
believed in. The British Association met that year at Southampton, and
Sir John Herschel was one of its sectional presidents. In his inaugural
address, on September 10, 1846, he called attention to the researches of
Leverrier and Adams in these memorable words:
"The past year has given to us the new [minor] planet Astraea; it has
done more--it has given us the probable prospect of another. We see it
as Columbus saw America from the shores of Spain. Its movements have
been felt trembling along the far-reaching line of our analysis with a
certainty hardly inferior to ocular demonstration."
It was nearly time to begin to look for it. So the astronomer-royal
thought on reading Leverrier's paper. But as the national telescope at
Greenwich was otherwise occupied, he wrote to Professor Challis, at
Cambridge, to know whether he would permit a search to be made for it
with the Northumberland equatorial, the large telescope at Cambridge
University, presented to it by one of the Dukes of Northumberland.


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