Question

Which describes one way that Aristarchus's explanation of the movement of objects in the sky was different from other scientists' earlier explanations?

He discovered Venus’s phases.
He argued that Earth rotates on its axis.
He explained the concept of retrograde motion.
He described the epicycles of the planets in the sky.

Answer 1

Answer:

How was Aristarchus's explanation of the movement of objects in the sky different from other scientists' earlier explanations? ... He explained the concept of retrograde motion. He described the epicycles of the planets in the sky. He stated that the Sun is the center of the solar system.