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 proposed Earth - axis rotation, different from earlier views. Others like Ptolemy had geocentric models without this concept. Discovery of Venus's phases is credited to Galileo, retrograde motion and epicycles were part of other ancient models.

Answer:

He argued that Earth rotates on its axis.