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Galileo Galilei was the Italian astronomer who supported Copernicus's theories by using his own observations through a telescope to provide evidence for the heliocentric model of the solar system.
Nicolaus Copernicus was the first to propose a heliocentric model of the solar system in the 16th century, which placed the Sun at the center with planets orbiting around it. Galileo Galilei supported Copernicus's ideas and used his observations through a telescope to provide further evidence for this model in the early 17th century.
Galileo's observations of the gibbous phase of Venus provided evidence supporting the heliocentric model proposed by Copernicus. This was because the changing phases of Venus could only be explained if it revolved around the sun, not the Earth. This observation helped to challenge the geocentric view of the universe.
Galileo Galilei made significant contributions to astronomy by observing celestial bodies through a telescope and supporting the heliocentric model of the solar system proposed by Copernicus. He also conducted experiments on motion and gravity, laying the foundation for modern physics. However, his advocacy for heliocentrism and clash with the Catholic Church led to his trial and house arrest.
Galileo Galilei provided evidence in support of Copernicus' heliocentric theory through his observations of the moons of Jupiter and the phases of Venus. His work helped to validate the heliocentric model and contributed to the eventual acceptance of the theory.