Nicolaus Copernicus
The heliocentric, or Sun-centered, system was first theorized by Nicolaus Copernicus.
Nicolaus Copernicus is famous for his heliocentric theory, which proposed that the Sun, rather than the Earth, is at the center of the solar system, with the planets, including Earth, orbiting around it. This theory revolutionized our understanding of the universe and laid the foundation for modern astronomy.
Galileo Galilei was the first astronomer to see the phases of Venus in 1610, providing evidence for the heliocentric model of the solar system proposed by Copernicus.
Ancient Greek philosopher Aristarchus of Samos is the first known individual to propose that the Sun is at the center of the solar system. His heliocentric model challenged the prevailing geocentric view of the universe.
The first person to theorize a heliocentric solar system was Aristarchus, a greek philosopher. However, he was ridiculed, and the first person to have the idea accepted was Copernicus.
He was the first astronomer to formulate a scientifically-based heliocentric cosmology that displaced the Earth from the center of the universe.
Ptolemy was the first person to introduce the theory of a geocentric universe, a universe in which everything revolves around the earth itself. But in 1543, Nicolas Copernicus was the first person to introduce and prove the idea that the universe is heliocentric, a universe in which everything revolves around the sun.
Nicolaus Copernicus
The heliocentric theory was first published by Copernicus.
The idea that Earth revolves around the Sunwas first realized in the 3rd_century_BCby Aristarchus_of_Samos. However, it was not until the 16th century that a fully predictive mathematical model of a heliocentric system was presented, by mathematician and astronomer Nicolaus_Copernicus. In the following century it was expanded by Johannes_Keplerand Galileo_Galilei.
Galileo
Rejected by his contemporaries and ignored for 18 centuries, Aristarchus of Samos proposed the first serious model of a heliocentric solar system. You may read about it in Archimedes' book, "The Sand Reckoner".
Rejected by his contemporaries and ignored for 18 centuries, Aristarchus of Samos proposed the first serious model of a heliocentric solar system. You may read about it in Archimedes' book, "The Sand Reckoner".
Aristarchus, in the 3rd century BC, was the first to postulate that our Solar System is heliocentric. Later, in 1743, Copernicus advanced the same hypothesis, but in a more comprehensive form.
From about 1510-1514 Copernicus developed his first general outline of his new heliocentric system.
It was the model devised by Copernicus.