Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: thebrain13 on 28/03/2007 20:11:51

Title: acceleration of the universe
Post by: thebrain13 on 28/03/2007 20:11:51

if we look farther away in space, does the matter get more and more dense, due to the fact that if the universe is accelerating then if we look into the past things must be closer together, or is the spread of the matter homogenous?

Title: acceleration of the universe
Post by: another_someone on 28/03/2007 23:06:42

This would be a reasonable supposition if all of the early universe was concentrated in a small section of the sky; but since the early universe is seen 360 degrees over the sky, so however small or large it may have been at the time, we still remain in the middle of out own visible universe, so at least in terms of area, it must be spread just as thinly over the horizons no matter how dense or otherwise it may have appeared at the time.

I cannot say what the density in terms of depth might.

Title: acceleration of the universe
Post by: thebrain13 on 03/04/2007 00:05:44

galaxies are moving away from each other. They accelerate relative to one another.

I really dont understand how that answers my question.