Page 101 - 89 history of astronomy_opt

complicated the problem. He located the
moon’s excentric as he had done the sun’s.
He also discovered some of the minor ir-
regularities of the moon’s motion, due, as
Newton’s theory proves, to the disturbing
action of the sun’s attraction.
In the year 134 B.C. Hipparchus observed
a new star. This upset every notion about
the permanence of the fixed stars. He then
101