In the 2nd century, Ptolemy published the Almagest, a comprehensive treatise on the movements of the stars and planets. It expanded Hipparchus’ geometric model of celestial motions, utilizing ...

Ptolemy’s treatise Almagest first came on the scene in the second century CE and remained the go-t0 astronomical text for the next twelve hundred years, firmly planting the geocentric model of ...

Ptolemy, who was born in 100 CE, was a renowned astronomer and mathematician who authored several important works, including Almagest and Geography. The treatise on the meteoroscope is a ...