Hoopworld

An artificial, self-gravitating torus world from the Orion's Arm Scenario

Category:

Film & Animation

Tags:

• animation
• Orion's
• Arm
• Celestia
• hoopworld

[SailorBarsoom]

hhhmmmnnn......

If I understand this correctly, this doesn't produce artificial gravity via spinning. This produces gravity the same way Earth does: just be being so durned massive.

Am I way off base?

[kemmerer]

You are quite correct. The hoop maintains its shape by rotating, and (like Earth) it is a self-gravitating semi-fluid shape, so gravity is perpendicular to the surface all over the torus.

One slight problem is that the hoop would respond to changes in rotation by changing shape, so it could not interact with other objects tidally without experiencing severe earthquakes.

[FunnyEarwigsmb]

doesnt the world need an active magnetic fielded core to help create a greenhouse effect and prevent water vapor from escaping?..... nothing against u or the video... just thought u might awnna look into that or ssomething. : )

[kemmerer]

An active magnetic field would be a good idea, and probably not that difficult to implement, since the core of this world is fluid. But in general magnetic fields are not absolutely essential for a terraformed world, as the rate of atmosphere loss would be quite low even on a small world like Mars.

A planet with no field would retain a breathable atmosphere for many million years (not long on a geological scale, but a little longer than most lifetimes).

[MultiIPwnage]

@kemmerer You came up with this hoop theory?

[kemmerer]

@MultiIPwnage

No, it was inspired by a discussion of this paper

The Equilibrium of Self-Gravitating Rings, by J Ostriker.

You should find it with Google.

[bobafetthotmail]

@kemmerer the Isn't the magnetic field of some use to protect you from solar weather (CMEs and stuff that throws high-energy protons at you). But maybe the atmosphere's own mass is enough to shield the place. Although aircraft tend to avoid polar orbits when there is solar activity for this reason. well, anyway.

[Jack470]

I have this,And it Orbits like someone is wiggling the Hoop around!(Not a big suprise, but umm...Yeah.)

[TheSANTAISREAL]

halo!

[Corinthian404]

HULA