# Bouncing universe

1. Sep 19, 2014

### wolram

There is a problem in cosmology, no one knows how the first stars were formed, so i thought maybe;

seed galaxies could be formed from inhomogeneites in a bouncing universe, where deconstruction of the first universe was not complete?

Is this possible or do you need complete annihilation of the first universe for a bounce to happen
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2. Sep 19, 2014

### mathman

3. Sep 19, 2014

### wolram

4. Sep 20, 2014

### wolram

I am sorry i said stars, i should have said galaxies.

5. Sep 20, 2014

### ChrisVer

Also in the diagram given in the same section, the no big-bang solutions need a large value for the vacuum energy ($\Omega_\Lambda>1$, whereas $\Omega_{\Lambda}^{(exp)}=0.692 \pm 0.010$ http://en.wikipedia.org/wiki/Cosmological_constant#.CE.A9.CE.9B_.28Omega_Lambda.29)