As Kepler's first attempt to invent a theory that agreed with Tycho's data, he tried to "fit" the data for Mars to an orbit that was
A) a circle with Earth at the center.
B) an ellipse with the sun at one focus.
C) a circle with the sun at the center.
D) an ellipse with Earth at one focus.
E) a loop- the- loop, i.e., a circle within a circle.

Question

Quizplus · Accepted Answer

Kepler initially tried to fit Mars' orbit to a circular path with the sun at the center, as circular orbits were a common assumption before he discovered the elliptical nature of planetary orbits.

As Kepler's First Attempt to Invent a Theory That Agreed