What was Tycho Brahe's greatest contribution to astronomy?
A. He first used the telescope to make extensive astronomical observations.
B. He determined that the planets orbit the Sun in elliptical orbits.
C. He proposed some simple laws that govern the motion of the planets and other objects.
D.He developed a model of the solar system in which the Sun was at the center
E.He amassed a large number of precise measurements of stellar and planetary positions in the sky.