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 ...

The first great attempt to make mapping realistic came in the second century A.D. with Claudius Ptolemy. He was an astronomer and astrologer obsessed with making accurate horoscopes, which ...

An international conference on the origins of galaxies pays tribute to the pioneering scientific cooperation between Muslims, ...

One was the 1522 edition of the Geography of Claudius Ptolemy, the other a collection of historical narratives whose authors included Marco Polo and Christopher Columbus. It’s impossible to know ...

Disfigured, awkward and clumsy, Claudius (10 BC – 54 AD / Reigned 41 – 54 AD) was the black sheep of his family and an unlikely emperor. Once in place, he was fairly successful, but his poor ...

Greek astronomer Claudius Ptolemy, who lived in Egypt, built upon Babylonian knowledge in his geocentric model of the universe. This model, which placed the Earth at the center of the universe ...

helped overthrow more than a thousand years of Aristotelian thinking (reinforced by Greek astronomer Claudius Ptolemy) which said that objects only moved if an external force drove that motion.