And the sun is in the center of the solar system, and the planets revolve around it.
See, then dumbell and the rock are falling at the same speed.
Copernicus was the first person to challenge ptolemy's geocentric theory with the heliocentric theory. he demonstrated that the sun is in the center of the solar system, not earth.
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Galileo supported copernicus's heliocentric theory and proved it with his invention, the telescope. when you look through the telescope, you could see the planets and the sun.
The church vs. science
Isaac Newton made the 3 laws of gravity. he proved that falling objects, no matter how heavy, will fall at the name rate of speed.
Francis bacon made the scientific method. It used logic to reach a conclusion.
And this is the scientific method
the church didn't like that the scientists were going against the bible and their social, political, and economic authority was on the line. they threatened the scientists saying that they had to take back their words or they would torture and excominicate them.
today, we use the teachings of the scientists to understand how gravity and motion work, where the sun and stars are, and to get around.