Ok, maybe your theory cannot be completely disproven with today's technology.
However there are certain things that make me doubt it.
Did you ever hear of "
Occam's Razor "? It is a theory that states that always the easiest theory that fully explains something is the right theory.
First of all: Photos taken from the sun by deep space missions showed that at a certain distance the sun looks nothing different than any other star. The easiest fitting explanation would be: All of the other visible lights in the sky are stars aswell.
This theory has not been disproven by any other measurement (gravitation can also be measured by looking at how the star bends light around him), so why not just accept it?

Secondly: I doubt that the solar system is anything special. If it was the only lightsource in our universe it would not make sense that it is situated in an outer spiral arm of a galaxy of wich there are millions.
We had that theory about earth beeing the center of the universe in the past and it didn't work out..
