People had known the earth was not flat for centuries before Galileo's birth - much navigational technology had all based on that fact, and would not have worked otherwise. Galileo is more well known for providing observations and evidence that the sun, not the Earth, was the centre of the solar system - however the main proponent of this fact was Copernicus, a century previously.
Galileo discovered the four largest moons of Jupiter (later named the Galilean moons), mountains and craters on the moon, phases of Venus, and sunspots on the sun. These observations supported the heliocentric model of the solar system and challenged the geocentric view of the universe.
Through his observation Galileo watched the motions of the planets and the sun. Using triginometry and geometry, he flat out knew that the earth could not be a stationary body. He also knew that the Earth could not be the center of the universe. The math told him otherwise. This was in direction contridiction of church doctrine and more in line with the helocentric theory that Copernicus came up with. Also the phases of Venus that he observed could only be possible if the Earth and other planets revolved around the Sun.He also discovered 4 of Jupiter's moons. This showed that there were objects revolving around other planets and not everything revolved around the earth
Galileo did not prove that Earth was not flat (It had already been agreed that it was round). Galileo invented the telescope and used it to prove that there were objects which did not orbit the Earth, supporting Copernicus' Heliocentric model for the universe. The Earth was known to be round by the ancient Greeks, but I do not who it found out initially (sorry).
that the moon was not flat, it was a sphere.
980-990
It was not discovered, it was assumed until proved otherwise.
Galileo discovered the four largest moons of Jupiter (later named the Galilean moons), mountains and craters on the moon, phases of Venus, and sunspots on the sun. These observations supported the heliocentric model of the solar system and challenged the geocentric view of the universe.
The ancient Greek philosopher Pythagoras is often credited with being one of the first to propose that the Earth was round in the 6th century BC. However, the idea of a spherical Earth was further popularized by the philosopher Plato and astronomer Aristotle.
3000 years ago someone discovered the earth was round and before that they thought it was flat.
Dear mom, i just discovered the world is a pair of balls!!! Sincerely,The guy who discovered the the world was a vagina
north america, native americans, and that the earth is not flat
Through his observation Galileo watched the motions of the planets and the sun. Using triginometry and geometry, he flat out knew that the earth could not be a stationary body. He also knew that the Earth could not be the center of the universe. The math told him otherwise. This was in direction contridiction of church doctrine and more in line with the helocentric theory that Copernicus came up with. Also the phases of Venus that he observed could only be possible if the Earth and other planets revolved around the Sun.He also discovered 4 of Jupiter's moons. This showed that there were objects revolving around other planets and not everything revolved around the earth
Christopher Columbus
Galileo did not prove that Earth was not flat (It had already been agreed that it was round). Galileo invented the telescope and used it to prove that there were objects which did not orbit the Earth, supporting Copernicus' Heliocentric model for the universe. The Earth was known to be round by the ancient Greeks, but I do not who it found out initially (sorry).
that the moon was not flat, it was a sphere.
The idea that the Earth is not flat was first proposed by ancient Greek philosopher Pythagoras in the 6th century BC. Later, the concept was further developed by other ancient Greek scholars such as Aristotle and Eratosthenes.
The roundness of the Earth was proved by the Greeks in the 3rd century BC and further verified by just about every society which was not based in Christianity in subsequent centuries. Therefore, no space flight was necessary to confirm the roundness of the Earth.