In what way do you consider the prevailing theory of gravity philosophical? Having a passing familiarity with it myself, I'd hardly term it so.
Really? Do you consider the universe as described by Newton pretty much philosophically identical to that described by Einstein? Do you think it needs no explanation or thought that we continue to use Newtonian physics to get work done, even though we know it to be massively wrong? Do you think that the fact that we can't account for 90% of the gravity we can measure is pretty much philosophically mundane? Do you find it totally unremarkable that the universal law of gravity seems to be the biggest effect in the universe, at large scale, and technically undetectable at small scale?
Actually, this seems like a pretty odd question to me. Why would you think abstract scientific theories aren't philosophical entities?