Question

Which scientist was the first to propose the heliocentric model of the universe?

Answer 1

Aristarchus of Samos was the first person (that we know of!) that proposed a heliocentric model of the universe, as early as about 200B.C). His model was rejected mainly because of Aristotle's influence.
Copernicus was the next person to propose a heliocentric model of the universe which was published in 1547. although very controversial at that time, this model was the one that caught on.

Answer 2

http://www.answers.com/Q/What_scientist_proposed_a_heliocentric_model_of_the_universe_and_the_theory_was_rejected

Answer 3

@mgarcia031