🚀 go-pugleaf

>jac@ds8.scri.fsu.edu (Jim Carr) writes:
>The annihilation would create photons which would have some
>contribution to the stress-energy tensor, so this wouldn't really
>work in principle either.  Gravitational waves (defined as small
>perturbations to a background metric) propagate at the speed of
>light, however.  This is a good an answer as I can give to the
>original question (please, let's not get into the "speed-of-gravity" 
>war again!)

The question asked what would happen if the sun disappeared, to
which the only good answer is Feynman's "*How* are you going to
make it disappear?"  The answer certainly depends on the details.
Within the context of current physics, it *can't* just blink out of
existence, so asking what would happen in that case, given GR,
is a question with no answer.
-- 
Matt McIrvin