<P> In astronomy , the geocentric model ( also known as geocentrism , or the Ptolemaic system ) is a superseded description of the universe with Earth at the center . Under the geocentric model , the Sun , Moon , stars , and planets all orbited Earth . The geocentric model served as the predominant description of the cosmos in many ancient civilizations , such as those of Aristotle and Ptolemy . </P>
<P> In astronomy , the geocentric model ( also known as geocentrism , or the Ptolemaic system ) is a superseded description of the universe with Earth at the center . Under the geocentric model , the Sun , Moon , stars , and planets all orbited Earth . The geocentric model served as the predominant description of the cosmos in many ancient civilizations , such as those of Aristotle and Ptolemy . </P>
who used the geocentric system to explain planetary motions
who used the geocentric system to explain planetary motions
Aristotle Ptolemy
Aristotle Ptolemy