How was Aristarchus's explanation of the movement of objects in the sky different from other scientists' earlier explanations? Check all that apply. 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. He stated that the Sun is the center of the solar system.
Answers
The last option is correct.
Aristarchus proposed the first heliocentric model of the then known universe, against the geocentric theories, proposed by the likes of Ptolemy and Aristotle.
Aristarchus’ stated that sun was the centre of the universe and the earth revolved around it (heliocentric), while theories of Ptolemy and Aristotle were that, the earth was the centre of the universe with other bodies going around it (geocentric).
Aristarchus (310 – 230 BC) was a Greek astronomer and mathematician.
Aristarchus of Samos was the first Greek person to come up with the theory that the sun is the center of the universe and the other planets revolve around it.
However the other Greek philosophers had another theory which stated that the earth was the center of the universe and the other planets including the sun revolved around the earth.
Hence we see that the opinions of Aristarchus of Samos were contrary to the popular belief.