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Apart from the absence of the plasma tube, I'd say it was Thistledown.
Where does your hollow asteroid get its light from?
--
Mike Williams
Gentleman of Leisure
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news:web.434d3354bcf9acee731f01d10@news.povray.org...
> This is a semi-serious WIP that I might or might not ever finish,
depending
> on how good / realistic later versions end up looking.
>
> Anyway, my challenge to you is: what is it? Answers on a post, first
correct
> answer gets... er, well, nothing very much really. You'll just have to
> settle for a virtual pat on the back.
>
> The sci-fi fans out there may find this an easy question... bit of a hint,
> that!
>
> Bill
>
It could be a beginning for the inside of Rama if the sea was a ring
But it must be in space and cylindrical, rotating to give an artificial
gravity
Marc
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Vapaus? How many Roger McBride Allen fans are there here, anyway?
Jerome
- --
******************************
* Jerome M. Berger *
* mailto:jeb### [at] free fr *
* http://jeberger.free.fr/ *
******************************
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Version: GnuPG v1.4.0 (GNU/Linux)
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M55dV0pl/fxErvTfHKXMI6Y=
=hoNX
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David El Tom nous apporta ses lumieres en ce 2005-10-12 12:16:
> Bill Pragnell wrote:
>
>
> don't how it's written correctly, but I would guess it's the inner of a
> "dysons sphere" or to say it in other words a world turned inside out.
> As boy I was a big fan of Larry Niven so I allways liked the idea of the
> "ringworld" more as you still could see the stars.
>
> ... dave
I have a BIG problem with Dyson spheres! Inside an hollow sphere, there is NO gravity,
if the sphere
is built around a star, everything not held in place will fall in the star. If you
make it spin, all
the air will collect at the equator, untill the sphere collapses unto itself. The
equatorial part
goes flying away and the poles plunging into the star.
--
Alain
-------------------------------------------------
Inside every older person is a younger person wondering what happened.
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Bill Pragnell nous apporta ses lumieres en ce 2005-10-12 12:01:
> This is a semi-serious WIP that I might or might not ever finish, depending
> on how good / realistic later versions end up looking.
>
> Anyway, my challenge to you is: what is it? Answers on a post, first correct
> answer gets... er, well, nothing very much really. You'll just have to
> settle for a virtual pat on the back.
>
> The sci-fi fans out there may find this an easy question... bit of a hint,
> that!
>
> Bill
>
>
> ------------------------------------------------------------------------
>
Inside some hollow cylindrical world, looking parallel to the axis of rotation? It
can't be the Rama
world-ship, the sea is not rign shaped, and there is no "light canions".
--
Alain
-------------------------------------------------
He who laughs last, thinks slowest.
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Alain wrote:
> I have a BIG problem with Dyson spheres! Inside an hollow sphere, there
> is NO gravity, if the sphere is built around a star, everything not held
> in place will fall in the star. If you make it spin, all the air will
> collect at the equator, untill the sphere collapses unto itself. The
> equatorial part goes flying away and the poles plunging into the star.
Why is there no gravity? If you take a sun-sized star and build a
sphere of Earths around it at 1 AU (dunno where you'd get that many
Earths), does the now hollow sphere not have gravity on either its
inside or outside surface?
--
Tim Cook
http://home.bellsouth.net/p/PWP-empyrean
-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GFA dpu- s: a?-- C++(++++) U P? L E--- W++(+++)>$
N++ o? K- w(+) O? M-(--) V? PS+(+++) PE(--) Y(--)
PGP-(--) t* 5++>+++++ X+ R* tv+ b++(+++) DI
D++(---) G(++) e*>++ h+ !r--- !y--
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Mike Williams wrote:
> Apart from the absence of the plasma tube, I'd say it was Thistledown.
>
> Where does your hollow asteroid get its light from?
>
Wow. Someone else reads what I read.
A.D.B.
P.S. Alain, Gravity is based on mass. A sphere the size of earth's
orbit with a shell thick enough to withstand impacts would naturally
have a reasonable amount of gravity on it's inside surface.
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news:434da298$1@news.povray.org...
> Why is there no gravity? If you take a sun-sized star and build a
> sphere of Earths around it at 1 AU (dunno where you'd get that many
> Earths), does the now hollow sphere not have gravity on either its
> inside or outside surface?
>
> --
> Tim Cook
> http://home.bellsouth.net/p/PWP-empyrean
>
Yes finding so much matter should be a problem but Alain is still right:
what could prevent other parts than equator falling in the star.
Marc
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"Anthony D. Baye" <Sha### [at] hotmailcom> wrote:
> Mike Williams wrote:
> > Apart from the absence of the plasma tube, I'd say it was Thistledown.
> >
> > Where does your hollow asteroid get its light from?
> >
> Wow. Someone else reads what I read.
>
> A.D.B.
>
> P.S. Alain, Gravity is based on mass. A sphere the size of earth's
> orbit with a shell thick enough to withstand impacts would naturally
> have a reasonable amount of gravity on it's inside surface.
Sorry Anthony,
but Alain is right. Inside a sphere there is no gravity from the sphere -
ask any physics guy ( me, eg ;-) ); at least if the sphere is homogeneuos
(spelling?). While Your statement definitely sounds convincing, this is one
of the few cases proving common sense can go wrong without dealing with
quantum mechanics ...
Happy Raytracing to all
Karl
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Wasn't it Tim Cook who wrote:
>Alain wrote:
>> I have a BIG problem with Dyson spheres! Inside an hollow sphere, there
>> is NO gravity, if the sphere is built around a star, everything not held
>> in place will fall in the star. If you make it spin, all the air will
>> collect at the equator, untill the sphere collapses unto itself. The
>> equatorial part goes flying away and the poles plunging into the star.
>
>Why is there no gravity? If you take a sun-sized star and build a
>sphere of Earths around it at 1 AU (dunno where you'd get that many
>Earths), does the now hollow sphere not have gravity on either its
>inside or outside surface?
There's gravity on the outside, but not on the inside. It just so
happens that the strong contributions from the small regions under your
feet are exactly cancelled out by the weaker contributions from the much
larger regions over your head. I don't think there's any simple way to
demonstrate that, you have to calculate the integral like Newton did.
--
Mike Williams
Gentleman of Leisure
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