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Nicolaus Copernicus was the astronomer to challenge the geocentric model of the solar system.
Aristotle was the first to develop a geocentric theory. But it is generally accepted that the Greek astronomer Ptolemy provided the most elaborated model of the geocentric view of the universe in which the Earth was the center. This idea lasted for centuries until the time of Copernicus.
The idea first came from Aristotle, the Great philosopher of the fourth century B.C.
copernicus :) =))))
Claudius Ptolemy
Claudius Ptolemy, an Egyptian astronomer, mathematician, and geographer, proposed the geocentric model around 140 B.C.The geocentric model states that the Earth exists at the center of the universe and everything else revolves around it. This was later shown incorrect by multiple other astronomers, such as Galileo, and proposed the more correct Heliocentric model.
Though many accepted the geocentric model of the universe, it was designed by the famous astronomer Ptolemy.
Nicolaus Copernicus was the astronomer to challenge the geocentric model of the solar system.
That would be Tycho Brahe who created the heliogeocentric model of the universe, which never became prominent at all.
ptolemy
Aristotle was the first to develop a geocentric theory. But it is generally accepted that the Greek astronomer Ptolemy provided the most elaborated model of the geocentric view of the universe in which the Earth was the center. This idea lasted for centuries until the time of Copernicus.
The idea first came from Aristotle, the Great philosopher of the fourth century B.C.
Claudius Ptolemy
Aristarchus of Samos proposed the heliocentric model in the 3rd century BC; however, his model did not work too well because the data the "scientific community" were working with at the time was wildly inaccurate (while at the same time, shockingly accurate in places given the apparatus they were working with).
A Geocentric model places Earth at the center of the Universe, with all of the stars and planets revolving around it. The most famous such model is that of Ptolemy. It stood as the accepted model until Copernicus was proven right by Galileo and Kepler.
You're probably thinking of Ptolmey, though the geocentric model predates Socrates and we're not sure who first came up with it.
The heliocentric model is sun-centered. The geocentric model is earth-centered.