posted on Jul, 3 2008 @ 06:17 PM
I'm not a physicist, but I've been reading a lot of cosmology lately. My understanding is that the balloon analogy has limits, matter does not stick
to space. Atoms, your wall, the solar system, the Galaxy do not increase their size. For very large scale structures, (superclusters of galaxies or
bigger) loosely tied together by gravity, expansion does have an effect because their individual components move in inertial reference frames drifting
away from each other.