Who proposed the heliocentric model that placed the sun at the center of the solar system?

Who proposed the heliocentric model that placed the sun at the center of the solar system?

• A. Copernicus
• B. Galileo Galilei
• C. Isaac Newton
• D. Johannes Kepler

Answer: (A)

The main idea here is recognizing the shift from Earth-centered to sun-centered thinking. Nicolaus Copernicus proposed that the Sun sits at the center of the solar system and the planets, including Earth, orbit around it. He laid this out in his work De revolutionibus orbium coelestium, challenging the long-held geocentric model. Galileo Galilei didn’t originate the idea but provided crucial observational support, such as the moons of Jupiter and the phases of Venus, which aligned with a sun-centered system. Johannes Kepler built on the model by describing planetary motion with ellipses and formulating laws that describe how planets move, reinforcing the heliocentric view. Isaac Newton later offered a physical explanation through universal gravitation, showing why bodies orbit the sun, but he did not introduce the initial proposal. So, the figure who first proposed placing the sun at the center is Nicolaus Copernicus.

The main idea here is recognizing the shift from Earth-centered to sun-centered thinking. Nicolaus Copernicus proposed that the Sun sits at the center of the solar system and the planets, including Earth, orbit around it. He laid this out in his work De revolutionibus orbium coelestium, challenging the long-held geocentric model.

Galileo Galilei didn’t originate the idea but provided crucial observational support, such as the moons of Jupiter and the phases of Venus, which aligned with a sun-centered system. Johannes Kepler built on the model by describing planetary motion with ellipses and formulating laws that describe how planets move, reinforcing the heliocentric view. Isaac Newton later offered a physical explanation through universal gravitation, showing why bodies orbit the sun, but he did not introduce the initial proposal.

So, the figure who first proposed placing the sun at the center is Nicolaus Copernicus.