Claudius Ptolemy was a Greek mathematician, astronomer and geographer who lived in the Egyptian city of Alexandria while under the rule of the Roman Empire. Much of medieval astronomy and ...

In Ptolemy’s time, it was accepted that the world was round, and he was the first to represent it on a flat surface. Maps in the earth sciences date back at least to the Egyptians and the Turin ...

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 ...