Which of these models of the solar system first proved that the sun is at one of the foci of Earth's elliptical orbit?
a. Brahe model
b. Kepler model
c. Ptolemic model
d. Copernicus model
Anyone Help Please!

Question

Which of these models of the solar system first proved that the sun is at one of the foci of Earth's elliptical orbit?
a. Brahe model
b. Kepler model
c. Ptolemic model
d. Copernicus model
Anyone Help Please!

anonymous · Answer

Brahe supplied data. Kepler supplied analysis. Ptolemy model wrong. Copernicus had improved model.  Did Kepler have a model? Yes, elliptical model. b best.

anonymous · Answer

@douglaswinslowcooper 
Thank you once again!(; haha