Both the geocentric model and the heliocentric model are explanations as to how the solar system (or the universe at the time) is organized. The geocentric model was proposed by Ptolemy during the second century. In this model, Earth is at the center of the solar system, and the sun, the other planets, and the moon revolve around Earth. It is not entirely an incorrect theory. The moon does revolve around Earth; however, the sun does not nor do any of the other objects in the solar system. Ptolemy's theory stuck around for a long time. It was not until Copernicus published his heliocentric model in the year 1543 that people began to consider anything else. The heliocentric model is a big shift from the geocentric model. Earth is no longer at the center of the solar system. Instead, the sun is now at the center, and all of the other planets, dwarf planets, comets, and so on revolve around the sun. Of course, if we want to get into some minor semantics, Earth is still at the center of something. We are at the center of our visible universe.
https://www.britannica.com/science/geocentric-model
Wednesday, January 31, 2018
What are the differences between geocentric and heliocentric models?
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