NCFE Social Studies Practice Exam

The heliocentric model of the universe, which posits that the Sun is at the center of the universe and that the Earth and other planets revolve around it, was formulated by Nicolas Copernicus. His groundbreaking work, "De revolutionibus orbium coelestium" (On the Revolutions of the Celestial Spheres), published in 1543, challenged the long-standing geocentric model that placed the Earth at the center of the universe. Copernicus's model laid the foundation for modern astronomy and significantly shifted the way people understood celestial movements.

While other figures like Galileo Galilei confirmed and supported the heliocentric theory with observations made through a telescope, and Johannes Kepler contributed laws of planetary motion that provided further insights into the orbits of planets, it was Copernicus who originally proposed and developed the heliocentric model. Isaac Newton later built on these concepts with his theory of gravity, which further explained the motion of celestial bodies. Thus, Copernicus is recognized as the pivotal figure in this revolutionary shift in astronomical thought.