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 geography ...

Astronomy Astronomers map one of the largest structures in the universe, hidden behind the Milky Way's 'Zone of Avoidance' Cosmology Largest-ever 3D map of the universe shows 47 million galaxies, from ...

A famous Greek astronomer and cartographer, Ptolemy's map of Ireland is incredibly accurate even though it was penned way back in 140AD. A map created by Greek astronomer and cartographer Claudius ...