RedWolf, that's an interesting page, but it is also wrong. The solar neutrino problem has been solved for several years. As a matter of fact, I went to a talk on it about 10 months ago. I can also tell that the guy knows somethings about physics, but doesn't really understand a whole lot more. The whole bit about astrophysics curricula not including "currents and E-fields" is just plain laughable. There shouldn't be any doubt that the sun radiates energy via nuclear fusion, primarily of hydrogen.
As for gravity changing in the recent past, there would be some tell tale signs. For instance, we could look at stars 100 million light years away to see if gravity was acting differently then than it is now. We could also examine how often the rate of deposition of dust and what not changed over the past 100 million years (stuff from space has different chemical signatures than earth stuff).