(otherwise known as The Almagest), Ptolemy made observations about the planets that are surprising. Compared with modern astronomical tables, some are so accurate that, Newton claims, he simply ...

Ptolemy’s model and many earlier ideas of the Solar System had the Earth at the centre of it. As observations of the motions of the planets became more detailed, the descriptions of the Solar ...

Did Copernicus borrow his cosmological theory from an earlier Muslim scientist? New research finds striking resemblance between Copernicus’s heliocentric treatise and a Muslim scientist’s cosmological ...