Originally proposed by [[Ptolemy]], it was abandoned when the observations of [[Copernicus]] lead [[Galileo]] to propose the [[Heliocentric]] theory, i.e. that the [[Universe]] revolves around the [[Sun]]. This [[Scientific method|theory]] has itself now been abandoned as newer observations have lead [[Astronomy|Astronomers]] to see the Sun as just one [[star]] among billions and abandon the notion of the Universe having any center. | Originally proposed by [[Ptolemy]], it was abandoned when the observations of [[Copernicus]] lead [[Galileo]] to propose the [[Heliocentric]] theory, i.e. that the [[Universe]] revolves around the [[Sun]]. This [[Scientific method|theory]] has itself now been abandoned as newer observations have lead [[Astronomy|Astronomers]] to see the Sun as just one [[star]] among billions and abandon the notion of the Universe having any center. |