Johannes Kepler Built on the Work of His Mentor,Tycho Brahe,to

Johannes Kepler built on the work of his mentor,Tycho Brahe,to:

A) discover the undreamed galaxy.
B) become the first court astrologer to Christiana of Sweden.
C) become the first court astronomer to the Holy Roman Emperor.
D) correct two of Copernicus's assumptions concerning planetary motion.
E) correct Galileo's first law of motion.