Kepler's hypothesis to describe the motions of the planets was derived from the meticulous observations performed and recorded by Tycho Brahe.
Kepler's discoveries regarding planetary motions were based on the observations of Tycho Brahe, who meticulously recorded the positions of celestial bodies. Utilizing Brahe's data, Kepler developed his three laws of planetary motion in the early 17th century, marking a significant advancement in astronomy. Thus, the correct answer is C. Brahe.
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