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  #1  
Old November 26th, 2003, 05:59 AM
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Default Re: Thoughts about sphere worlds

no, that was Kamog.
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Old November 26th, 2003, 08:05 AM
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Default Re: Thoughts about sphere worlds

Omnicron, it is highly unrealistic to expect all graphics to be to scale. If the star was displayed as a single pixel, you would still need millions of pixels to display the solar system to scale! Of course, then the star and planets would be the same "size". So lets make the sun take up a few 1000 pixels, so we can get more accurate scales for the planets. Now we need billions of pixels for the width of the system map! Give me abstract scaling any day! (note that numbers are made up, and are likely to be overly generous, with real values probably being many times larger)

Also, please note that SE4 is a game, not a simulation. Some level of unreality is not only expected, but required! Who cares if it is practically impossible to build a sphereworld (or even a ringworld) in the real world! It is practically impossible to colonize a planet in a different star system too. Should we remove that because it is unrealistic?

[ November 26, 2003, 06:08: Message edited by: Imperator Fyron ]
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Old November 26th, 2003, 01:17 PM
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Default Re: Thoughts about sphere worlds

Quote:
Originally posted by Imperator Fyron:
Omnicron, it is highly unrealistic to expect all graphics to be to scale
It's very easy to make all se4 system graphics to scale. just replace all the sun with single pixel image and all the planets with complete blank images. That should be about what the solar system looks like from above. Might be hard to play though.
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Old November 26th, 2003, 05:49 PM
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Default Re: Thoughts about sphere worlds

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Old November 26th, 2003, 06:39 PM

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Default Re: Thoughts about sphere worlds

Quote:
Originally posted by narf poit chez BOOM:
you know, someone once wrote an interesting story about people using dolphin suits to fly in a spherical orbital habitat.
yea who was that? wasent one of asimovs short storys was it?
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Old November 26th, 2003, 07:25 PM
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Default Re: Thoughts about sphere worlds

Quote:
Originally posted by se5a:
quote:
Originally posted by narf poit chez BOOM:
you know, someone once wrote an interesting story about people using dolphin suits to fly in a spherical orbital habitat.
yea who was that? wasent one of asimovs short storys was it?
I haven't read any of the books, but there's a series by David Brin that involves intelligent dolphins using space suits. I just can't remember the name of the series, however.
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Old November 26th, 2003, 08:25 PM

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Default Re: Thoughts about sphere worlds

The gravity of a shell is not precieved by objects within the shell. For this reason, the gravity you experience will grow less and less as you penetrate deeper and deeper into a body such as the Earth.

This is how black holes work. There are many, many stars with sufficient mass to become a black hole. However, they are too big and continue growing as they get hotter with age. It is the heat that pushed the mass of a star ourward from the nuclear reaction that occurs at or very close to its core. At some point a the fusion reactor at the center of the star runs out of fuel that it can fuse at the pressure exerted by the mass of the star pulled inward by its own gravity. At this point the star collaspes in on itself, as it is not producing enough heat to keep itself puffed up. When a sufficient amount of the stars mass gets compressed into a sufficiently small space then you will have a black hole.

At least, I'm pretty sure that's how that works. I am sure about the shell part.

From the outside, the shell will will be an immense amount of gravity. But if the outside surface is spinning, and it will be spinning much faster than the earth's orbital velocity, then at the equator one would be thrown off at around 1 G. In thruth it would be pretty damn hard to ladn on, you'd have to be on one wicked eliptic... though I could have the scale wrong.

Additionally, no human would be able to run or jump fast enough agaisnt the spin of the world to escape it and start floating. I believe, in order to get the 1 G, you'd have to be cranking damn fast.

You actually have some options, where radius and rpm are concerned, since the equation for relative centrifugal force goes like this.

RCF (in g forces) = 1.119x10^-5 x rpm^2 x radius (in cm)

hmm... that rpm is going to be troublesome... oh, centimeters, too... Yeah, the units in this equation are going to kill me.

In any case the gravity will definately be sufficient to keep the atmosphere pinned into the 'bowl' at the equator.

Kamog, that is an excellent solution for the "gradient gravity of a sphereworld" problem. Note, however, that you would need huge, ringworld-style walls between the rotating sections or the atmosphere would all flow downhill. Note also that when the plane formed by that ring does not bisect the star's center of gravity the ring is not in a 'stable orbit' the way a ringworld or solid sphereworld are Though the outer sphere could just provide a mounting point for these various rings, which I think you suggested. Remember that they would, however, be subjected to a pull away from the sphere and toward the star, and the 'ground' would have to be inclined to compensate.

[ November 26, 2003, 18:27: Message edited by: Loser ]
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