I recently read in my "10th grade" physics textbook that the universes is constantly streaching making solarsystems farther apart, yet for some weird reason all objects still stay intact. This explination included ireverence for such fundimental concepts as the cartisian coordinate system. I was wondering, is there any reason why space has to streach, could it not be true, instead, that everything was getting smaller, everything constantly falling in on itself? This would make the explination make more sence, the only thing that my modle does not account for that I know of, is that my physics text book used the streaching model to explain the bending of light. Can someone with some knowledge of this tell me what an idiot I am and how I simply need to ignore the normal rules of reality in order to understand this level of physics?