102.core. lean. euyendily. cuni player9.3 (moody, steven)the solar systemquiz active2how was aristarchus's explanation of the movement of objects in the sky different from other scientists' earlierexplanations? check all that apply. he discovered venus's phaseshe argued that earth rotates on its axis. 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.