Re: opposite of relativistic time contraction

On 2008-03-17, Greg Egan <gregegan@[EMAIL PROTECTED]
> wrote:
> But I guess Erik's point is that when you're talking about voids
> versus galactic clusters, the appropriate comparison is with purely
> gravitational red****fts, which aren't that high even quite close to
> a black hole (e.g. sqrt(1/3) at the photon sphere).

Oh yes, the gravitational time dilation due to galactic and
supergalactic structures is pretty minimal, probably less than 1 part
in 10^8.  Certainly not much use in the original scenario, especially
since the time dilation experienced at the speeds required to get out
to a void would vastly exceed any benefit.

It only becomes significant added up over a large fraction of the
lifespan of the universe: an extra century or so.


- Tim