What is the heliocentric theory?

1 Answer
Oct 24, 2015

The heliocentric theory is/was the theory that the sun is the center of the universe.


"helios" is the Greek word for sun.

The heliocentric theory replaced the geocentric theory; in the geocentric theory the earth ("geo") was modeled as the center of the universe.

The heliocentric model is often still employed when limited to our solar system but is no longer accepted as a working model for the universe.