Kepler discovered that the orbit of each planet is a(n) Response area, rather than a perfect circle.
An Earth-centered system of planets is known as a(n)Response area model.
ancient Greek, Ptolemy's geocentric, Copernicus's heliocentric
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The sun-centered system of planets developed by Copernicus is an example of a heliocentric model.
Kepler discovered that the orbit of each planet is an ellipse, rather than a perfect circle.
An Earth-centered system of planets is known as a(n) geocentric model.
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