Question

whos model of the solar systen had
a earth is fixed in a crystalline sphere





dont get this wrong

Answer 1

The model of the solar system that portrayed the Earth as fixed in a crystalline sphere is associated with **Claudius Ptolemy**, an ancient Greek astronomer. In his geocentric model, which was elaborated in the work known as the **Almagest**, Ptolemy described the Earth as the center of the universe, surrounded by a series of concentric crystalline spheres that held the moon, planets, and stars. This model dominated astronomical thought for many centuries until the heliocentric model proposed by Copernicus gained acceptance.