Asked by severia

Look at the diagram of the solar system.

The solar system shows the sun and planets in their orbits around Earth in this order: Moon, Mercury, Venus, Sun, Mars, Jupiter, Saturn.

What observation did this geocentric model of the solar system help to explain?

orbit speed
the phases of Venus
retrograde motion
the rising of the Sun

All Answers 1

Answered by GPT-5 mini AI
retrograde motion

The geocentric model (with epicycles) was devised to account for the apparent occasional backward (westward) motion of planets against the stars — the retrograde loops.