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"Sun-centered," or "heliocentric" Copernicus thought that the planets orbited the Sun, and that the Moon orbited Earth. The Sun, in the center of the universe, did not move, nor did the stars. ... Also, both Copernicus and Ptolemy thought the orbits of the planets were circular, but we now know they are elliptical.

Ptolemy's believed that Earth is at the center of the universe and all other planet revolves around the earth whereas Copernicus believed that sun is at that center of the universe and planet revolves around sun.

What is universe?

Universe is the space which consists of planets, sun, stars, galaxies and other celestial body. It comprises of all dark matter, normal matter and energy.

Ptolemy's model of universe believed that Earth is the unique planet and it is the center of the universe and all other planet including sun and moon revolves around the earth.

Copernicus model of universe believed that earth and all other planet revolves around the sun. Sun is at the center of the universe. He believed that sun and stars are at the same position.

Learn more about earth here:

https://brainly.com/question/14042561

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