Re: Black Holes in the Big Rip

On Sep 24, 7:20 pm, OwlHoot <ravensd...@xxxxxxxxxxxxxx> wrote:
If the expansion of the Universe is accelerating, as recent
observations indicate, and this continues, then eventually
space will be expanding at faster than light speed in a
vacuum (the so-called "Big Rip").

Faster relative to what?

Check out http://en.wikipedia.org/wiki/Big_Rip.

It suggests all structures would be ripped apart. I couldn't
understand the wikipedia article, so I've tried an attempt at
explanation here:

A galaxy in a region of space expanding at the speed of light relative
to us will disappear because in the next second dark energy expansion
will take it beyond our ken. Eventually every galaxy will go that way,
then every star, then everything!

Idle speculation:

From the viewpoint of a black hole, the only things in the universe
would be the singularity, the event horizon, whatever is between the
singularity and event horizon. The event horizon would be ripped off
the black hole at each moment of expansion to be replaced by another
event horizon. The black hole is losing energy to the expanding
universe so, by conservation of energy, it must cool down and keep on
cooling. Would it keep on cooling for ever, getting exponentially
closer to absolute zero but never reaching it?

What about from the viewpoint of ..er... a point in empty space? It
would be all empty space until (at a distant time in the future) a
vacuum fluctuation initiates another big bang?

.

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