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Which limitation occurred when astronomers transitioned from Ptolemaic to heliocentric models?

A)Elliptical orbit calculations complexities arise
B)Stars show measurable annual parallax
C)Planet retrograde motion is unexplained
D)Lunar phases are impossible to predict

💡 Explanation

Heliocentric models required accurate modeling of non-circular orbits. Introducing elliptical orbits meant that epicycle calculations, a form of harmonic analysis, needed reformulation with complex mathematics; therefore, orbital calculations became complex rather than employing purely circular approximations.

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