We can observe directly about the solar system and the galaxy that the objects do not revolve around the earth. This has been observed for thousands of years in the retrograde motion of Mars, which appears to mysteriously turn around and go backwards for a while at certain points in its orbit.
For Mars to be orbiting Earth, it would have to have an extremely complicated and arbitrary orbit. By contrast, it is very easy to explain the motions of objects under gravity by one simple rule that applies to both apples on earth and planets in the sky.
That doesn’t rule out beyond a shadow of a doubt that the universe could have been designed with some bizarre, arbitrary set of rules that just happen to mimic perfectly the operation of one very simple rule viewed from one particular location. But that’s a very self-centered and inefficient way to go about trying to understand the universe.
It’s far easier to construct a coherent, cogent model of the universe if you don’t start with the assumption that you’re in some special, select place. You could have been anywhere, and observed the same physical laws. That leads to very elegant and effective models of the universe that are far more useful than trying to preserve humanity’s ego.
Source: Quora
