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One could not simply point a telescope at the sky and find planets. Galileo calculated the positions of various planets at different times of the year. His observations led him to adopt the heliocentric theories of Copernicus.
optical
The first telescope was used by Galileo Galilei (first used in 1609) to see the faraway planets and stars of the galaxy.
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).
galileo was put on trail becuase he published a book supporting that the planets orbit the sun
Copernicus, with the use of the heliocentric theory and Galileo with his telescope proved the planets revolve around the Sun.
One could not simply point a telescope at the sky and find planets. Galileo calculated the positions of various planets at different times of the year. His observations led him to adopt the heliocentric theories of Copernicus.
Galileo
he used his telescope to map all of the planets.
Galileo and Copernicus
optical
Galileo was the first person to use a telescope for technological uses.
the sun, stars, planets, moon, through a telescope
Actually Nicholas Copernicus did, but he was afraid unlike Galileo Galilei and Nicholas published his findings when he was close to death he knew his beliefs would get him in trouble with the Roman Catholic Church. Galileo did make a telescope and discovered Jupiter had moons that went around it and used it as proof. In the end of his life when he was older he was put under house arrest. His assistant was able to trick the guards and smuggle his book to get published.
The first telescope was used by Galileo Galilei (first used in 1609) to see the faraway planets and stars of the galaxy.
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).
yes as you know we use the telescope to see other planets. since we had the telescope, we have discovered five new planets in our solar system which lay beyond pluto