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Questions regarding the history of astronomy, including discoveries and scientists.

2 votes
0 answers
112 views

Empirical findings, Occam's razor, and the replacement of Ptolemaism by heliocentrism [closed]

C. S. Lewis's book The Discarded Image is about how to understand and how not to misunderstand medieval literature. In some parts he explicitly contrasts medieval with modern culture. In one of those …
Michael Hardy's user avatar
31 votes
2 answers
9k views

How did Eratosthenes know that the sun is far away?

The famous measurements and calculations done by Eratosthenes around 300 BC are very widely known. He concluded correctly that the circumference of the Earth is about $252\,000$ times the length of an …
Michael Hardy's user avatar