SOLAR SYSTEM

Detailed explanation-1: -Once widely accepted, the geocentric model is now a debunked theory that the Earth is the center of the universe, with the sun and planets revolving around it. Nevertheless, some still believe the universe revolves around them.

Detailed explanation-2: -In astronomy, the geocentric model (also known as geocentrism, often exemplified specifically by the Ptolemaic system) is a superseded description of the Universe with Earth at the center. Under most geocentric models, the Sun, Moon, stars, and planets all orbit Earth.

Detailed explanation-3: -(Actually, Aristarchus (∼250 B.C) had promoted the heliocentric theory but it was not popular in his time.) Copernicus adopted a heliocentric view because it better explained the motions of the heavens mathematically. This view had the Earth and other planets moving in circles around the fixed Sun.

Detailed explanation-4: -This gave rise to the Geocentric model of the universe, a now-defunct model that explained how the Sun, Moon, and firmament circled around our planet. The notion that the Earth was the center of the Universe is certainly an understandable one.

Detailed explanation-5: -A: Ptolemy was supporter of Geocentric model of universe but Galileo was against this model.

Detailed explanation-6: -Ptolemaic system, also called geocentric system or geocentric model, mathematical model of the universe formulated by the Alexandrian astronomer and mathematician Ptolemy about 150 CE and recorded by him in his Almagest and Planetary Hypotheses.