Which contribution did ptolemy make to our view of the solar system? a. he proposed the sun-centered model of the solar system. b. he showed that planets moved in elliptical orbits. c. he proposed that gravity kept the planets in their orbits. d. he proposed the earth-centered model of the solar system.

The contribution that Ptolomy made to our view of the solar system is that D. he proposed the Earth-centered model of the solar system. According to this ancient Greek astronomer, the entire solar system, including the Sun, and other stars and planets, revolved around the Earth. He considered that the Earth was the center of the universe, and its most important part. However, later on it was concluded that everything revolved around the Sun, not the Earth.