Copernicus's work on the problem of the Ptolemaic system was commissioned by:
A)the Polish royal family.
B)Tycho Brahe's observatory.
C)the Roman Catholic Church.
D)Galileo Galilei and the University of Padua.
E)the tsar of Russia.

Question

Quizplus · Accepted Answer

Copernicus's work on the problem of the Ptolemaic system was not commissioned by any individual or institution. He developed his heliocentric model of the universe on his own, and his findings were eventually published in his book "De Revolutionibus Orbium Coelestium" (On the Revolutions of the Celestial Spheres). However, the Catholic Church did monitor and question the book's findings, leading to its eventual condemnation.

Copernicus's Work on the Problem of the Ptolemaic System Was