Galileo's observations of the gibbous phase of Venus proved that the Sun was the center of the Solar System, with the planets revolving around it. This disproved the prevailing theory of the time that the planets orbited around the Earth.
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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's observations of the gibbous phase of Venus proved that Venus orbits the sun. He also discovered that the sun and Earth's moon were not perfect spheres.
Although they are not considered "anamolies" now, at the time these observations did not fit into standard ideas about the cosmos: 1) Jupiter has moons. 2) The Milky Way consists of stars. 3) Venus has phases over time.
Using inclines, Galileo discovered that all objects fall at the same rate. He was also the first to witness the moons around Venus, proof that the solar system does not revolve around the Earth.
Well, Some of the astronomical things that he observed are: the phases of Venus. the craters on the Moon .Jupiter's orbiting moons
Venus has a heliacal rising when it appears in the eastern sky just before sunrise, signaling its visibility as a morning star. The timing of Venus's heliacal rising occurs approximately every 19 months.
Galileo's main branch of science was astronomy, where he made groundbreaking contributions to the understanding of the solar system by observing the moons of Jupiter and the phases of Venus. He also contributed to the fields of physics and mechanics with his work on motion and gravity.