On Thu, Apr 04, 2019 at 08:21:38PM +0000, Phil Pugliese (via tml list) wrote:

If it's even a half-decent size (say, at least 0.1 parsecs across)
then it wouldn't make much difference in such a short time frame.  All
the energy pumped out could still be building up in the space and it
wouldn't get hot enough to matter for millions more years.

Using as example a wrap-around cube 0.1 parsecs across and containing
one Sol-like star, the average flux after a million years would be
3000 lux.  This would certainly be bright: similar to a cloudy day on
Earth everywhere in space.  However, it would not be hot: an object
fairly distant from the star would reach an equilibrium temperature of
about -120 C.  Things would not be heating up to human-scale
temperatures until another ten million years passed.


For larger spaces, the timescale before things get hot goes up with
the cube of the diameter.  A space that is a full parsec across with
one Sol-like star in it gives about ten billion years before getting
warm.


- Tim
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Well, inasmuch as the (not so) pocket universe that we know about in the 'Marches (not that there couldn't be others) comprises three TU 'systems', occupying 3 TU 'hexes' (parsecs), it looks like G'father, as usual, comes out looking pretty smart after all! And since it's been, what, 100's of thousands of years since it was created,  I suspect that there's probably no noticeable effect.