Page 606 - 89 history of astronomy_opt

The law of gravitation having been proved
to extend to the stars, a discovery (like that
of Neptune in its origin, though unlike it in
the labour and originality involved in the
calculation) that entrances the imagination
became possible, and was realised by Bessel–
the discovery of an unknown body by its
gravitational disturbance on one that was
visible. In 1834 and 1840 he began to sus-
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