Derek Lyons <
fair...@gmail.com> wrote:
>Dan Tilque <
dti...@frontier.com> wrote:
>>> Well, it does have a black hole in its middle. If someone can
>>> identify the YASID, we can estimate whether that fact was known
>>> before or after the story was written.
>>
>>Bill Snyder indentified it as Harrison's "Final Encounter". Googling
>>shows it was published in 1964. I don't remember exactly when they found
>>the central black hole, but some time in the 70s.
>
>Keep in mind that Milky Way's central black hole is like the Great
>Pacific Garbage Patch - much, *much* more impressive in the media's
>and public's imagination than it is in reality.
Wikipedia's info that it's thought to be around 4 million+ solar masses
means it's about 12 million km in radius (or, since radius doesn't make
that much sense for one, 75 million km around).
About 20% the size of Mercury's orbit, so larger than the Sun by a factor of
17 or so but small on the scale of the Solar System.
ObSF: Which means the measurements for Uran s'Varek, the Inquestor's homeworld
(an odd version of Dyson Sphere) at the center of the galaxy, around the
central black hole, aren't out of line - 446 million km ("hokh'klomets")
around, easily enough to contain the black hole.
I'm thinking the other constants mentioned - it seems to be 1g at the
surface, they live on the outside of it, and an atmosphere "thousands of
klomets deep" is mentioned several times to blur the radiation from the press
of stars in the core but the surface seems to be at 1 atmosphere also _and_
the sky doesn't seem to be burning-hot - are still rather wacky.
But then there's massive telekinetic telepathic computer banks
("thinkhives") that direct the infalling stars every several decades through
the openings at the poles, so presumably, as well as making sure the black
hole stays spinless and getting rid of any accretion disk it tries to form,
they're holding off the pressure from the atmosphere and the heat from the
radiance...
Anyway, the dyson sphere around it is rather more spectacular than the hole
itself, yes, in that series.