## Wednesday, June 24, 2015

### critical density in stationary universes

imagine that the scale factor does not change, because we're at the point of maximum extend of a recollapsing universe. would it be possible to define a critical density?

#### 1 comment:

1. An answer without thinking about it, so caveat lector: If the universe just manages to collapse, then presumably it will do so at an arbitrarily large size, which means that the density would be arbitrarily low.