Claudius Ptolemy (Klaudios Ptolemaios) and the Sphericity of the Earth
Abstract
We know
almost nothing about Claudius Ptolemy except that he was a Greek scientist
who lived and worked in Alexandria in the second century of the
common era (CE). He produced important
surviving contributions in optics, harmonics and other areas. He
produced a work on astrology, regarded as an important science in antiquity.
However, his most significant contributions were in geography
and astronomy. In both areas, he produced texts which were to survive
as the canonical texts for more than twelve hundred years.