Ptolemy directs here. For other people by that name, see Ptolemy (Disambiguation)

Historical Figure
Nationality: Egypt, Roman Empire
Date of Birth: AD 90
Date of Death: AD 168
Cause of Death: Natural causes
Religion: Roman pantheon
Occupation: Astronomer, Astrologer, Mathematician, Geographer, Musician, Author of Non-Fiction
Turtledove Appearances:
"But It Does Move"
POD: c. 1633 (?)
Type of Appearance: Posthumous reference
Claudius Ptolemaeus (AD 90 – 168), known in English as Ptolemy was a Roman mathematician, astronomer, geographer and astrologer. He lived in Egypt under the Roman Empire, although he appears to have been of Greek descent.

Ptolemy was the author of several scientific treatises. The astronomical treatise now known as the Almagest set forth the concept of the geocentric universe: Earth is the center of the universe, with the Sun, the Moon, and the stars revolving around her.

This model was eventually adopted as doctrine by the Catholic Church.

In 17th century, when Galileo Galilei advocated the Copernican view that the Sun was the center of the solar system, the Church accused him of heresy.

Ptolemy in "But It Does Move"Edit

Cardinal Sigismondo Gioioso convinced Galileo Galilei that Ptolemy's view was correct as far as the Catholic Church was concerned, but that, even if it weren't, the layman did not notice or appreciate that the Earth moved.