This is just a random science tidbit. Two bodies with mass will always interact just a little bit, but in the case of the Earth our effect on the Sun is so small as to be negligible. In the case of Jupiter, it is not. Jupiter is so massive that it moves the Sun just a little bit, so they are actually technically orbiting each other. As for exactly what gravity is and where it came from, I can’t tell you, but I am grateful for it.