how did galileo prove the sun to be the center of the solar system and what could I do to conduct my own test?

Answer 1

He based his theorm on ptolemy's model which he knew was not quite right as ptolemy set the Earth as the center of the solar system.

There were problems predicting certain planets positions with Ptolemy and Galileo set out to improve the model. He came up with putting the Sun instead of the Earth at the center and found that now the planets could be more closely predicted.

There are 2 ways to do your own test.

First chart the planets and how many days each one takes to rotate the Sun and also chart the planet's position to the Earth.

Secondly, build a model with gears that would closely resemble that of Galileo's model. For fun, also copy Ptolemy's model.

Answer 2

Simple answer: He noticed that Venus went through phases like the moon and deduced that it must be orbiting the sun.
"The heliocentric model of the solar system developed by Copernicus predicted that all phases would be visible since the orbit of Venus around the Sun would cause its illuminated hemisphere to face the Earth when it was on the opposite side of the Sun and to face away from the Earth when it was on the Earth-side of the Sun. In contrast, the geocentric model of Ptolemy predicted that only crescent and new phases would be seen, since Venus was thought to remain between the Sun and Earth during its orbit around the Earth. Galileo's observations of the phases of Venus proved that it orbited the Sun and lent support to (but did not prove) the heliocentric model."

Answer 3

He didn't really prove it, but he gave good evidence against Earth being the center. He proved that Venus orbits the Sun by observing the phases of Venus (that's something you could do, too, with a telescope). He proved that there are other objects that DON'T orbit Earth, namely the moons of Jupiter (another something you could do, with a telescope).

One way to prove that Earth orbits the Sun is to observe stellar parallax, but that's not very easy to do. Aside from that, I can't think of anything that could prove Earth orbits the Sun as opposed to the Sun orbiting Earth. Just because the other planets orbit the Sun doesn't mean Earth has to.

Answer 4

He didn't prove anything at all. Modern geo-centrism has Venus around the Sun, but the sun around the earth. The 1887 Michelson and Morley experiment failed to demonstrate that the earth is in motion. (Look it up)!

The answer is that science (so-called) has dug in its heals and refuses to dialog the question again. Instead, name calling is their best evidence.

Answer 5

look at the sun spots, the rotation of the sun proves that the sun revolves or something like that something about sun spots
oh he proved that the sunspots changed so that the earth revolved around the sun. something like that. you might want to reasearch about that

Answer 6

the way the planets rotated was more like the universe was heliocentric (sun centered)

Answer 7

He read the work of Copernicus.