GENERAL KNOWLEDGE

Detailed explanation-1: -Galileo discovered evidence to support Copernicus’ heliocentric theory when he observed four moons in orbit around Jupiter.

Detailed explanation-2: -The Heliocentric Model. The most important idea in Copernicus’ De Revolutionibus is that Earth is one of six (then-known) planets that revolve about the Sun. Using this concept, he was able to work out the correct general picture of the solar system.

Detailed explanation-3: -Much later, the great inventor and astronomer Galileo Galilei presented an argument for the validity of the Sun-centered Copernican model, as opposed to the older Earth-centered Ptolemaic model, for which he got into trouble with the church.