SOLAR SYSTEM

Detailed explanation-1: -How does Ptolemy’s model of the universe compare with Aristotle’s model? Both models are heliocentric. Both models are based on a parallax. Both models show that celestial objects have elliptical paths.

Detailed explanation-2: -Ptolemy accepted Aristotle’s idea that the Sun and the planets revolve around a spherical Earth, a geocentric view. Ptolemy developed this idea through observation and in mathematical detail.

Detailed explanation-3: -Under most geocentric models, the Sun, Moon, stars, and planets all orbit Earth. The geocentric model was the predominant description of the cosmos in many European ancient civilizations, such as those of Aristotle in Classical Greece and Ptolemy in Roman Egypt.

Detailed explanation-4: -How did the Greek model and Ptolemy model differ? The Greek model had stars as part of the system and they revolved around the Earth. Ptolemy’s model did not include the stars, but it did include the moons that revolves around the planets.

Detailed explanation-5: -The ancient Greek philosopher Aristotle said that objects fall because each of the four elements (earth, air, fire, and water) had their natural place, and these elements had a tendency to move back toward their natural place.

Detailed explanation-6: -The Ptolemaic model differs from other proposed solar system models because the planets have epicycles. Explanation: Ptolemaic model believed that the earth is at the centre with the moon, sun, stars and other planets rotating or revolving around the earth. This model assumed that the planet moved in a circle.