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Category: Ancient astronomers

3 articles

The list below is believed complete, though membership – like everything here – is subject to revision.

  • Anaximander – The Milesian who first set the Earth adrift, unsupported at the centre of things – and left it, all the same, flat on top.
  • Eratosthenes – Greek polymath (c. 276–194 BC) who measured the Earth's circumference to within a few percent – the figure whole-radian geometry declines to address.
  • Ptolemy – Alexandrian astronomer (c. 100–170 AD) whose Earth-centred cosmos held for 1,400 years – its central Earth, to his admirers' inconvenience, a sphere.

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