How Did Tycho Brahe's Astronomical Observations Undermine the Ptolemaic Model

question 69

Multiple Choice

How did Tycho Brahe's astronomical observations undermine the Ptolemaic model of the universe?

• A) They demonstrated that Jupiter had moons.
• B) They demonstrated the existence of yet undiscovered planets beyond Saturn whose gravity was influencing the known planets.
• C) They demonstrated that the comet of 1577 needed to have passed right through the crystalline spheres postulated by the Ptolemaic model.
• D) They demonstrated that the planets must have circular orbits.
• E) They demonstrated that planetary motion was elliptical not circular.