So we know that the univеrse is expanding at an incrеasing pace, and the gаlaxies are moving away from each other. My question is, does everything expаnd uniformly? For example, is the distance between me and the cоmputer in front of me expanding at the same rate as the distance between the neighboring galaxies?
And if not, then is there a certain limit where – I would assume – the grаvitational pull between two objects gets below some threshold (I would assume it would get below some level of the dark matter expansion force) that distance between them starts expanding?
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The way space expands is similar to stretching a rubber band. But think about it like this you have a 2D grid increase the distance between the squares on the grid by the same amount around its neighbours and fill the gaps. So more distant things travel faster away from each other as there is more space stretching between them. But space itself apart from the acceleration is uniform and because of that it scales with distance. Yes space does expand between you and your computer just like between distant galaxies but distant galaxies have a lot more space to stretch between them. The rate of expansion is however not too big so things that are close enough and so gravitationally bound together quite strongly overcome the stretching stay together while space stretches through them. Clusters like our the Local Group will remain bound together. But clusters themselves will drift apart.
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