The Last Days of Ptolemy Grey follows the story of a 91-year-old man crippled with dementia.
Others think it may be a cenotaph, built to house Alexander himself but then left empty after Ptolemy made off with his body.
Ptolemy drew up a catalogue of 1080 stars based on the earlier work of Hipparchus.
Unfortunately, we know very little as to the personal history of Ptolemy.
Think of Ptolemy writing about Caerlaverock, and calling it Carbantorigun!
The name, Ptolemy, appears to have been a common one in Egypt in those days.
Ptolemy assumed that a degree at the equator was 500 stadia instead of 604 stadia in length.
Ptolemy is, without doubt, the greatest figure in ancient astronomy.
Ptolemy,” she replied, “is evidently a mind reader, for he told me where you were before I saw Huldah.
Ptolemy had, however, few of those sources of knowledge which are now accessible.
Greek astronomer and mathematician who based his astronomy on the belief that all heavenly bodies revolved around Earth. Ptolemy's model of the solar system endured until the 16th century when Nicolaus Copernicus proposed that the heavenly bodies in the solar system orbited the Sun.
An ancient Greek astronomer, living in Egypt, who proposed a way of calculating the movements of the planets on the assumption that they, along with the sun and the stars, were embedded in clear spheres that revolved around the Earth. The system of Ptolemy, called the Ptolemaic universe, prevailed in astronomy for nearly fifteen hundred years, until the modern model of the solar system, with the sun at the center and the planets in motion, was developed from the ideas of Copernicus.