Copernicus developed the theory, Galileo supported it with his observations.
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.
Galileo used his telescope to look into space where he noticed that Nicalous Copernicus was correct in saying that the Earth revolves around the sun. Which Galileo was arrested for believing.
Nicolaus Copernicus found out what happens with the Earth's movements.
Galileo di Vincenzo Bonaiuto de' Galilei
Copernicus produced his model with the Sun at the centre in 1543, and then in 1609 Kepler produced the model that we use now. Kepler's model also uses the idea of having the Sun at the centre. No-one proved anything but after Newton's discoveries in physics it was realised that Kepler's model fitted exactly with Newton's later theories in gravity and dynamics, so that's why it became accepted, and it still is.
no it is the Galileo one
Copernicus was the first to propose the Heliocentric theory, the correct theory that the Sun, not the Earth, is the center of the solar system.
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.
Copernicus was in 1543, a polish astronomer named Nicolaus Copernicus. Copernicus's theory - The sun is at the center of the Universe. Galileo Galilei was in 1609, Galileo became the first person to use a telescope to observe celestial bodies.
Galileo used his telescope to look into space where he noticed that Nicalous Copernicus was correct in saying that the Earth revolves around the sun. Which Galileo was arrested for believing.
Nicolaus Copernicus found out what happens with the Earth's movements.
Ptolemy
Aristotle came first, followed by Ptolemy, then Copernicus and Galileo. Other important players in the story after them were Tycho Brahe, Johannes Kepler and Isaac Newton.
Claudius Ptolemy wrote the first book of astronomy
Galileo di Vincenzo Bonaiuto de' Galilei
the first to formulate a comprehensive HeliocentrismCosmology, which displaced the Earthfrom the center of the Universewas Nicolaus Copernicus
Copernicus and Galileo are the first to come to mind, but there are many others beside these two.