I'm Aristotle and I think Earth is the center of all things
and i also think that if Earth went around the sun, then the relative positions of the stars would change as Earth moves.
I'm Copernicus and I think that the heliocentric model is correct.
I'm Aristarchus and I proposed a heliocentric model of the solar system. And I think that the sun is in the middle.
I also formulated three principles1. the planetary orbits are ellipses with the sun at one focus.2. the planets move faster in their orbits when closer to the sun.3. relates the distance of a planet from the sun to the time it takes to go once around it's orbit.
I'm Kepler and I discovered that requiring planetary motions to be circular did not fit the observations perfectly.
I'm Ptolemy, and I developed a detailed geocentric model that has been used by astronomers for 14 centuries.
I also believe that a celestial body travels at a constant speed in a perfect circle
I also looked at Jupiter's 4 main moons. I gave support to the heliocentric model.
I'm Galileo and I invented the scientific method. I also improved the telescope.