"Kind of scary that heliocentrism can't be proven."
You mean other than the group pictures of the earth, sun, mars (in the far distance), and moon taken by Voyager (along with other such shots) on its way out to the outer planets?
Not to mention the other 1,000's of ways mentioned on this thread.
It's been more than adequetely proven to me. I was just somewhat facetiosly responding to this "higher, relativist" hurdle of "proof."