Science & Mathematics » Geography » What is the difference between geocentric and heliocentric model of the universe?

# What is the difference between geocentric and heliocentric model of the universe?

• "Geos" refers to earth. "Helios" refers to helium, which the sun is made of. "Centric" roughly means center.

While that should be enough information to answer your question, be informed also that neither of these two theories is correct. The universe revolves neither around the earth nor the sun (although the solar system revolves around the sun). The universe is so large that we have no idea really what's in the center or even where the center lies, assuming there is one.
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• Geocentric model
In astronomy, the geocentric model (also known as "geocentrism, "geocentricism," or the Ptolemaic view of the universe), is the theory, now superseded, that the Earth is the center of the universe and other objects go around it. Belief in this system was common in ancient Greece. It was embraced by both Aristotle (see Aristotelian physics) and Ptolemy, and most, but not all, Ancient Greek philosophers assumed that the Sun, Moon, stars, and naked eye planets circle the Earth.

Heliocentrism, or heliocentricism, is the astronomical model in which the Earth and planets revolve around a stationary Sun at the center of the universe. The word comes from the Greek ( helios "sun" and kentron "center"). Historically, heliocentrism was opposed to geocentrism, which placed the Earth at the center. The notion that the Earth revolves around the Sun was first proposed in the 3rd century BC by Aristarchus of Samos. However, it was not until the 16th century that a fully predictive mathematical model of a heliocentric system was presented, by the Renaissance mathematician and astronomer Nicolaus Copernicus, leading to the Copernican Revolution. In the following century, this model was elaborated and expanded by Johannes Kepler and supporting observations made using a telescope were presented by Galileo Galilei.

See more at Wikipedia.org
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