Home Page link

Building a celestial body

Home| Search | About
Login Password
Register Now! Lost Password?

Architecture and Design - Building design/construction and related topics. 

Page 1 of 3       1 2 3 > last >> Bookmark this page:  YahooMyWeb Yahoo!  Google Google  Windows Live Favorites Windows Live  del.icio.us del.icio.us  digg digg  Add to Netscape Netscape
Subject Author Date
Building a celestial body Michael Mol 08-01-2007
If you were  Registered and logged in, you could reply and use other advanced thread options
Posted by Michael Mol on August 1, 2007, 1:48 am
Here's an interesting thought problem for you folks.

The gravitational acceleration a person experiences is derived from
the mass of the body we're relating to, and the distance of the person
from that body's center of gravity. On Earth's surface, this is
nominally about 9.8 m/s^2, or what we call "one gravity." On
Jupiter's "surface", the experienced acceleration is much greater.

However, if one could hold a position at 110,000 km from Jupiter's
center of gravity, one would experience an acceleration of about one
gravity, making the planetary experience, on the whole, much more
comfortable. (Radiation belts aside.) If one were to build a shell
around Jupiter with an outer radius of 110,000 km, one would also get
a surface area of 19.6 billion square miles, or over 99 times the
surface area of Earth. *Lots* of living space, and, unlike some other
celestial megastructures, your atmosphere is stuck to your shell by
gravity.


The question becomes, what would one want to build such a thing out
of? I don't have a background in mechanical or architectural
engineering, which is why I come to you folks. I imagine one would
want concrete, as I picture the stresses forcing the shell to compress
laterally across its surface. But how much concrete would one need?
How much water (A scarce resource in space, though Jupiter happens to
have a large ice moon) would be needed?

Another engineering-related line of thought I can't follow up on is
the effect of tidal forces...Jupiter has several large moons. How
much of an effect would they have on the shell?

Incidentally, this is part of a sci-fi world-building project I'm
working on called Grokked Universe. Here's the relevant thread:
http://guforum.shortcircuit.us/index.php?topic=38.0


Posted by per.corell@privat.dk on August 1, 2007, 5:29 am
> Here's an interesting thought problem for you folks.
>
> The gravitational acceleration a person experiences is derived from
> the mass of the body we're relating to, and the distance of the person
> from that body's center of gravity. On Earth's surface, this is
> nominally about 9.8 m/s^2, or what we call "one gravity." On
> Jupiter's "surface", the experienced acceleration is much greater.
>
> However, if one could hold a position at 110,000 km from Jupiter's
> center of gravity, one would experience an acceleration of about one
> gravity, making the planetary experience, on the whole, much more
> comfortable. (Radiation belts aside.) If one were to build a shell
> around Jupiter with an outer radius of 110,000 km, one would also get
> a surface area of 19.6 billion square miles, or over 99 times the
> surface area of Earth. *Lots* of living space, and, unlike some other
> celestial megastructures, your atmosphere is stuck to your shell by
> gravity.
>
> The question becomes, what would one want to build such a thing out
> of? I don't have a background in mechanical or architectural
> engineering, which is why I come to you folks. I imagine one would
> want concrete, as I picture the stresses forcing the shell to compress
> laterally across its surface. But how much concrete would one need?
> How much water (A scarce resource in space, though Jupiter happens to
> have a large ice moon) would be needed?
>
> Another engineering-related line of thought I can't follow up on is
> the effect of tidal forces...Jupiter has several large moons. How
> much of an effect would they have on the shell?
>
> Incidentally, this is part of a sci-fi world-building project I'm
> working on called Grokked Universe. Here's the relevant
thread:http://guforum.shortcircuit.us/index.php?topic=38.0

What to build from 3D-H ofcaurse ; 3dh is not a material but a method
the only one that in architecture today fir the computer ,and make a
direct link from projecting to manufactoring. But the reson the method
shuld be chosen are, that all it requier is sheet material, that mean
that if you want to build a structure, all you must look for, is sheet
material of some kind , look up 3D-H or 3D Honeycomb --- not the ready
made sheets of honeycomb cubes but the buildng method.


Posted by Michael Bulatovich on August 1, 2007, 8:10 am

> Here's an interesting thought problem for you folks.
>
> The gravitational acceleration a person experiences is derived from
> the mass of the body we're relating to, and the distance of the person
> from that body's center of gravity. On Earth's surface, this is
> nominally about 9.8 m/s^2, or what we call "one gravity." On
> Jupiter's "surface", the experienced acceleration is much greater.
>
> However, if one could hold a position at 110,000 km from Jupiter's
> center of gravity, one would experience an acceleration of about one
> gravity, making the planetary experience, on the whole, much more
> comfortable. (Radiation belts aside.) If one were to build a shell
> around Jupiter with an outer radius of 110,000 km, one would also get
> a surface area of 19.6 billion square miles, or over 99 times the
> surface area of Earth. *Lots* of living space, and, unlike some other
> celestial megastructures, your atmosphere is stuck to your shell by
> gravity.
>
>
> The question becomes, what would one want to build such a thing out
> of? I don't have a background in mechanical or architectural
> engineering, which is why I come to you folks. I imagine one would
> want concrete, as I picture the stresses forcing the shell to compress
> laterally across its surface. But how much concrete would one need?
> How much water (A scarce resource in space, though Jupiter happens to
> have a large ice moon) would be needed?
>
> Another engineering-related line of thought I can't follow up on is
> the effect of tidal forces...Jupiter has several large moons. How
> much of an effect would they have on the shell?
>
> Incidentally, this is part of a sci-fi world-building project I'm
> working on called Grokked Universe. Here's the relevant thread:
> http://guforum.shortcircuit.us/index.php?topic=38.0

I'm confused, man...which way's this doob goin? <suppresses cough>



Posted by N:dlzc D:aol T:com \(dlzc\) on August 1, 2007, 9:14 am
Dear Michael Mol:
...
> The question becomes, what would one want to build
> such a thing out of?

*Want* to build it out of wimmun.
*Have* build it out of unobtanium.

> I don't have a background in mechanical or
> architectural engineering, which is why I come to
> you folks. I imagine one would want concrete, as I
> picture the stresses forcing the shell to compress
> laterally across its surface. But how much concrete
> would one need?

Concrete won't work, not enough strength for a shell that will
support a human.

> How much water (A scarce resource in space,
> though Jupiter happens to have a large ice moon)
> would be needed?

Enough to drink.

> Another engineering-related line of thought I
> can't follow up on is the effect of tidal forces...
> Jupiter has several large moons. How much of
> an effect would they have on the shell?

Our Moon swings the Earth around a little circle, and there is a
"three meter high" lump that follows the Moon around. Jupiter is
massive enough that it swings the Sun around a point just outside
the surface of the Sun. You'd have real difficulties keeping the
shell in place.

> Incidentally, this is part of a sci-fi world-building
> project I'm working on called Grokked Universe.
> Here's the relevant thread:
> http://guforum.shortcircuit.us/index.php?topic=38.0

Dyson sphere. Ringworld.

David A. Smith



Posted by Michael Bulatovich on August 1, 2007, 12:15 pm

> Dear Michael Mol:
> ...
>> The question becomes, what would one want to build
>> such a thing out of?
>
> *Want* to build it out of wimmun.
> *Have* build it out of unobtanium.
>
>> I don't have a background in mechanical or
>> architectural engineering, which is why I come to
>> you folks. I imagine one would want concrete, as I
>> picture the stresses forcing the shell to compress
>> laterally across its surface. But how much concrete
>> would one need?
>
> Concrete won't work, not enough strength for a shell that will support a
> human.
>
>> How much water (A scarce resource in space,
>> though Jupiter happens to have a large ice moon)
>> would be needed?
>
> Enough to drink.
>
>> Another engineering-related line of thought I
>> can't follow up on is the effect of tidal forces...
>> Jupiter has several large moons. How much of
>> an effect would they have on the shell?
>
> Our Moon swings the Earth around a little circle, and there is a "three
> meter high" lump that follows the Moon around. Jupiter is massive enough
> that it swings the Sun around a point just outside the surface of the Sun.
> You'd have real difficulties keeping the shell in place.
>
>> Incidentally, this is part of a sci-fi world-building
>> project I'm working on called Grokked Universe.
>> Here's the relevant thread:
>> http://guforum.shortcircuit.us/index.php?topic=38.0
>
> Dyson sphere. Ringworld.

Second reference to Dyson on the group in a month!



Page 1 of 3       1 2 3 > last >>
Similar ThreadsPosted
Building Construction - Issue Of Building Permits (Victoria) June 17, 2007, 5:27 am
Looking for pictures of the Seagram Building / Bilder vom Seagram Building gesucht April 6, 2007, 12:33 pm
I'm looking for a building January 12, 2008, 6:32 am
I'm looking for a building January 12, 2008, 6:33 am
Exterior building February 9, 2007, 7:33 am
about intelligent building February 20, 2007, 10:40 pm
Building projects February 28, 2007, 9:43 am
Building identification May 2, 2007, 3:45 am
Building Codes May 23, 2007, 11:35 am
The Love of a Building February 9, 2008, 8:44 pm

Contact Us | Privacy Policy

XML SitemapXML Sitemap