Inertial singularity

From: Damien Broderick (
Date: Fri Oct 06 2000 - 22:51:31 MDT

At 12:29 AM 6/10/00 -0700, Eugene wrote on a different topic altogether:

>The numbers of
>galaxies you can reach before the accelerating spacetime expansion
>makes travel impossible is finite.

I haven't seen much thought given to this disturbing implication of a
plus-signed lambda.

At some point, the universe inside one's light-cone thins out. Then it goes

Maybe this is so far off that stars and planets are long since gone anyway
(I suspect so). But I wonder: if Mach is right, what happens to inertia in
a big emptying bubble like that? If inertia is an effect of the mass of the
rest of the universe, presumably it also diminishes over time, finally to
nothing. Hmmm...

Damien Broderick

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