Ring World

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A Ring World is an incredibly strong band could be set rotating about a central star, making a "Niven Ring", that uses centrifugal force to provide a simulation of gravity.


Please see the following AAB articles for related information:


Description / Specifications[edit]

A "Niven Ring" style ringworld with a radius of 148 million km (93 million miles) and a width of 1.6 million km (1 million miles) would have a usable surface area equal to three million planets the size of Terra (Solomani Rim 1827).

A "Ringmoon" is a smaller-scale ringworld, built for example around a gas giant or even a mainworld.

Planetary Characteristics[edit]

Advanced Materials Science: The construction of ringworld requires a very advanced materials technology, since the stresses of a megastructure the size of even a small ringworld would require immense tensile strength.

  • Some of the most advanced material of the Imperium, Bonded Superdense and Coherent Superdense, do not even come close to the adequate material strength required for ringworld construction. Some Imperial scientists have hypothesized that it would take at least a TL-19 mastery of materials science, far beyond current Imperial technology achievements, to build strong-enough materials to construct a ringworld.
  • Based upon analysis of the materials used in existing ringworlds that are presumed to have built by the Ancients, the Ancients must have had an incredible materials science.
  • Please see Construction Material for more information about construction materials currently available in Charted Space.

Buckminsterfullerene (Advanced Material)[edit]

Imperial scientists estimate that it would take a very advanced version of Buckminsterfullerene, or carbon Bucky Ball nanotubes, to build even a small ringworld.

Ringworld UWP[edit]

Ringworlds are buildable at TL-T (TL 27).

  • "Small" ringworlds use world and gas giant size codes.
    • Using a size code of 'Y' indicates a stellar-scale (i.e. "Niven-Ring" style) ringworld construct.
    • It's going to have a comment code of 'Ax' in every case.
    • Due to TL skew, most UWPs with a size code of Y and a comment code Ax will be ringworlds, rather than dyson spheres. Regardless, additional notes will typically be expected.
  • In its prime, Leenitakot's UWP could be Leenitakot AY66C45-T Hi Ax. Up to about a thousand years after pseudo-"Leenitakot" dies, the UWP is Leenitakot AY66000-T Di Ax.

Probably Planetary Orbit & Climate[edit]

No information yet available.

History & Background / Dossier[edit]

The Ancients are thought to have created a ringworld in the Leenitakot system of the Hinterworlds.

Worlds & Sectors (Astrography)[edit]

Ringworlds are incredibly rare and no more than a handful are both known and can be located at a verifiable astrographic location.

  • While no more than a handful of ringworlds are known, many more are rumored at in myths, legends, and the tales of salty old spacefarers...
  • Some advanced thinkers have posed the idea that the society of the Ancients ranged far beyond the borders of Charted Space. Indeed, some project that ringworlds and other signs of cultures far more advanced than the Third Imperium will be found throughout the known Dakhaseri (Milky Way Galaxy).
  • Some scientists have projected that many more ringworlds could be found within pocket universes.
  • And others have projected that any society capable of building a ringworld probably also possesses the technology to build a mobile ringworld.

World Listing: 1105[edit]

Known ringworlds can be located in the following systems and worlds:

2 of 2 World articles in Ring World
Leenitakot  •  Northstar  •  
startbacknext(2 listed)

References & Contributors (Sources)[edit]

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This article was copied or excerpted from the following copyrighted sources and used under license from Far Future Enterprises or by permission of the author.

  1. Donald P. Rapp. Beyond (Paranoia Press, 1981), 12 (Non-Canon).