Question

Please give two observations Aristotle made that led him to believe in his geocentric model.

a) Aristotle observed that the stars move in circular paths around Earth and that the Moon is much closer to Earth than the Sun.
b) Aristotle observed that the Moon's phases were caused by its orbit around Earth and that planets move in elliptical orbits.
c) Aristotle observed that the Earth casts a shadow on the Moon during lunar eclipses and that the Sun rises in the east.
d) Aristotle observed that the stars form constellations in the night sky and that Earth is not a perfect sphere.

Answer 1

+-Final answer:

Aristotle believed in the geocentric model based on his observations of stars moving in circular paths around Earth and the Moon being closer to Earth than the Sun.

Step-by-step explanation:

Aristotle made two observations that led him to believe in his geocentric model:

1. He observed that the stars move in circular paths around Earth. This observation led him to conclude that Earth must be at the center of the universe.
2. He also observed that the Moon is much closer to Earth than the Sun. Based on this observation, Aristotle believed that Earth must be stationary and that the Moon and the Sun orbit around it.

These observations, along with the prevailing belief in the perfection of circular motion, formed the basis for Aristotle's geocentric model.