Question

which describes one way that aristarchuss explanation of the movement of objects in the sky was different from other scientists earlier explanations? he discovered venuss 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.

Explanation:

Aristarchus was one of the first to propose that the Earth rotates on its axis. This was a departure from earlier views which often held the Earth to be stationary. The discovery of Venus's phases is often attributed to Galileo. The concept of retrograde motion and epicycles were part of the Ptolemaic system which was different from Aristarchus's heliocentric - inspired ideas.

Answer:

He argued that Earth rotates on its axis.