Page 347 - 89 history of astronomy_opt

ting.
About 300 B.C. an observatory fitted
with circular instruments for star positions
was set up at Alexandria, the then centre
of civilisation. We know almost nothing
about the instruments used by Hipparchus
in preparing his star catalogues and his lu-
nar and solar tables; but the invention of
the astrolabe is attributed to him.[1]
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