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Which astronomical prediction became increasingly complex when geocentric models incorporated epicycles?

A)Timing lunar eclipse totality
B)Predicting solar flare frequency
C)Determining stellar parallax position
D)Estimating planetary retrograde motion

💡 Explanation

Planetary retrograde motion presented a challenge; additional epicycles were introduced to match observed paths because the deferent/epicycle model needed adjustments through geometric superposition rather than simpler circular pathways. This led to far more complex calculations, therefore predicting retrograde became harder, rather than solar flares.

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