The discussion revolves around the relationship between the acceleration of the universe's expansion and the density of galaxies, particularly in the context of the Lambda-CDM model. Participants explore the implications of cosmic expansion on the visibility and density of galaxies over time, referencing both theoretical models and popular literature.
Participants express differing views on whether the density of galaxies can vanish entirely and the role of accelerated expansion in this process. There is no consensus on the implications of these ideas, and the discussion remains unresolved.
Some claims rely on interpretations of theoretical models and popular science literature, which may not be universally accepted or clearly defined. The discussion includes assumptions about visibility and the effects of cosmic expansion that are not fully elaborated.
This looks like a common misconception. Objects once seen never disappear. Apart from getting ever dimmer until eventually too hard to observe, that is. But the light is still there, reaching the observer.mbond said:I mean the number of visible galaxies goes vanishing because of the Acceleration. This is told in the book "A universe from nothing" by L.. Krauss, chapter "Our miserable future". Is there a paper or a reference where this is calculated?
In addition to Bandersnatch's comment, nearby galaxies aren't moving apart. It isn't immediately obvious that they would ever necessarily spread out far enough to be part of the fading Bandersnatch mentions.mbond said:I mean the number of visible galaxies goes vanishing because of the Acceleration. This is told in the book "A universe from nothing" by L.. Krauss, chapter "Our miserable future". Is there a paper or a reference where this is calculated?