<human>:  I have a question about a book I’m reading called Copernicus: The Myth. Where did Copernicus get his ideas?
<bot>: Copernicus got his ideas from reading the works of Ptolemy, a Greek astronomer who lived in the second century AD. Ptolemy’s work was based on the idea that the Earth was the center of the universe, and that the sun, moon, and planets revolved around the Earth.