Which scientist was the first to put the sun at the center of the "universe"?

A. Isaac Newton

B. Ptolemy

C. Nicolas Copernicus

D. Tycho Brahe

Answer: C. Nicolas Copernicus

Explanation:

Copernicus's model of the universe (heliocentric theory) was refuting the long life geocentric theory (the Earth as the center of the universe) proposed by Ptolemy and accepted by the Catholic Church.

In this sense, Ptolemy's model of the universe placed the Earth in the center of the known universe, where our planet remains stationary while the other planets, the Moon and the Sun describe complicated orbits around it.

As Ptolemy was a respected astronomer and geographer, this idea was accepted for a long time, until Copernicus arrived with the new model.