Researchers from the CNRS, Sorbonne Université and Tyndale House (affiliated with the University of Cambridge) have recently found fragments of the Star Catalogue composed by the Greek astronomer ...

Until now, this text was known only through the writings of Claudius Ptolemy, another ancient astronomer who composed his own catalogue nearly 400 years after Hipparchus.

Claudius Ptolemy, an ancient Greek astronomer, had one of the first written records of explaining retrograde motion in the second century A.D.

Most notable, this revealed Ptolemy’s treatise on the Meteoroscope, which is an instrument for measuring the position, length, and direction of the apparent path of a shooting star.

Claudius Ptolemy, an ancient Greek astronomer, had one of the first written records of explaining retrograde motion in the second century A.D.

In 1952, the German-French artist Jean Arp made several trips to Greece, where he encountered the ideas of Claudius Ptolemy, the Greco-Roman astronomer, mathematician and geographer best known for ...