Geocentric Solar System
Date: 1 Jan 1568
A 16th century view of the universe with Earth at its center. This illustration of the geocentric solar system was created by Portuguese cosmographer and cartographer Bartolomeu Velho in 1568.
The ancient Greeks counted the Earth's moon and sun as planets along with Mercury, Venus, Mars, Jupiter, and Saturn. Earth was not considered a planet, but rather was thought to be the central object around which all the other celestial objects orbited.
The first known model that placed the sun at the center of the known universe with the Earth revolving around it was presented by Aristarchus of Samos in the third century BCE, but it was not generally accepted. It wasn't until the 16th century that the idea was revived by Nicolaus Copernicus. By the 17th century, astronomers (aided by the invention of the telescope) realized that the sun was the celestial object around which all the planets - including Earth - orbit, and that the moon is not a planet, but a satellite (moon) of Earth.
Credit: Bibliothèque Nationale, Paris