I wonder how the expansion affected the solar system. Yes, I know that gravitationally bound objects had already "adapted" to the expansion. But it had adapted to the linear expansion - this assumption is valid only when we analyze a limited period of time. But the rate of the expansion changes, so there are 2nd degree effects which affect the gravitationally bound systems. Even without the dark energy, but the dark energy makes it even more interesting How big are these effects in the solar system during 4 billion years?