Question

if we added a jupiter mode change the results of galilos experiments

Answer 1

Galileo's Experiment on planetary movements is the amount of speed (velocity) each planet moves around it's orbit, and orbital motion of the planets. Galileo also observed the Tides of the ocean as it is affected by the combined rotation and revolution of the Earth around it's axis. If the Earth had a similar Gravitational Pull as Jupiter, this would greatly affect any passing object around the inner solar system; and would change the results Galileo had in his original theories.

In short, if the Earth was as dense and had the same Gravitational Pull as Jupiter, a bunch of things would have surrounded our planet and he would think that the earth was the center of the solar system.

Also note, Jupiter being the largest Gaseous planet in the solar system, is "almost" a Star. The only thing that didn't make it into a star is the lack of Nuclear explosions within its core...