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jan 1, 140 BC - G: Hipparchus

Description:

Greece: Hipparchus develops the basis of trigonometry. In his work in astronomy, he completes the first scientific star catalog, mapping around 850 starts.

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History of Mathematics 2019

ByAly
16 Jul 2019
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1442

Date:

jan 1, 140 BC
Now
~ 2167 years ago
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