Final answer:
Ptolemy, a Greek philosopher, came up with the origins of the Ptolemaic system. He developed a complex model of the solar system that centered around Earth and used circles to explain the motions of the planets.
Step-by-step explanation:
The origins of the Ptolemaic system were developed by a Greek philosopher named Ptolemy who lived in the second century AD. He proposed a complex model of the solar system that centered around Earth and used circles to explain the motions of the planets. Ptolemy's model was described in his work called Almagest, which also discussed the astronomical achievements of other Greek astronomers, including Hipparchus.