Theoretically, the universe is expanding uniformly over time, dragging the galaxies along with it, right? That's why we can see the galaxies flying away from each other faster than the speed of light. But I was told they are not technically moving through space but with it. Like drawings on the surface of a balloon as it is inflated. So if this is true why would this universal (italicized meaning everything) expansion stop at galaxies? Shouldn't suns, planets, molecules, even atoms etc. etc. be expanding away from each other as well?