My understanding is that it is the galaxy groups that are moving apart. If this is the case would it not be that the gravitational force between the groups would lessen. Thus, the gravitational attraction within the groups, and individual galaxies, would become more dominant, pulling bodies closer together. should we not then see more stars as we look up?
That of course depends on some things we don't quite understand yet. For example, my understanding of dark energy is that after it pushes all the galaxies apart it will continue to push the stars in the galaxies apart, then all matter will be pushed apart, until even the subatomic particles are disintegrated. Of course this depends a lot on just what dark energy is and how it operates.
And someplace just recently I saw that somebody is questioning the reality of dark energy. He thinks that the apparent acceleration in the expansion of the universe is a problem with the measurement. Ah! here it is
Physorg.com has the story.
Bill
