Orion's Arm

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Orion's Arm (or "OA" for short) is an online science fiction world-building project, founded by M. Alan Kazlev. Anyone can contribute articles, stories, artwork, or music to the website. A large mailing list exists, in which members debate aspects of the world they are creating, discussing additions, modifications, issues arising, and work to be done.

[edit] Setting

OA is set over ten thousand years in the future, and adheres to plausible, or "hard" science fiction; that is, no human-like aliens, no faster-than-light travel or other violations of the known laws of physics, and no "naval analogy" space battles. Certain speculative technologies, such as the creation of negative-mass exotic matter and the manipulation of matter on length scales much smaller than that of an atom, do appear in the setting, distinguishing it from "ultra-hard" science fiction (which assumes only technologies proven to be possible). The denizens of this universe are ruled over by god-like, superintelligent artificial intelligences (AIs), called "archailects", the descendants of humanity's (though not exclusively) early artificial life experimentations. These beings are so powerful that they can create new miniature universes. Their bodies exist as distributed intelligences in networks of planet-sized computer brains; their subroutines are themselves sentient, making an "archai" an individual and a civilization at the same time. Extraterrestrial life exists, but the focus is entirely on the descendants and creations of Earth life, here collectively called "terragen life". Normal humans, called "baselines", are an endangered species. Their genetically and cybernetically enhanced descendants have supplanted them. There are many types of intelligent life: nearbaselines (enhanced humans), posthumans, cyborgs, vecs (intelligent robots), aioids (intelligent computers), uploads (intelligences transferred into computers), neumanns (self-replicating robots; named for John von Neumann), provolves (animals with enhanced intelligence, similar to "uplift" - see below), rianths (humans with animal DNA spliced in), splices (similar to provolves, upgraded with human DNA), neogens (life genetically synthesized from non-life) and xenosophonts (aliens). Nanotechnology, picotechnology, and femtotechnology are common. Ringworlds, Dyson spheres and other "megastructures" exist. Known space is connected by a network of wormholes.

OA is a part of the transhuman space opera subgenre. The world was influenced by Iain M. Banks' Culture series, Vernor Vinge's A Fire Upon the Deep, and David Brin's Uplift Universe, among others. It takes the concept of the technological singularity from Vinge's work, but changes its meaning considerably. In Orion's Arm, there is not one singularity but at least six, and they refer not to stages in the technological development of civilizations as a whole, but to different levels of consciousness in individuals.

A computer game and a role-playing game are being developed by the community, within the OA milieu.

[edit] Prominent fictional technologies

Technologies that feature prominently in the Orion's Arm setting include:

• Nanotechnology, and sub-atomic analogues.
• Extremely advanced artificial intelligence.
• Space megastructures.
• Production and manipulation of exotic matter, for use in reactionless space drives and wormholes.
• Stable wormholes, allowing apparent faster-than-light travel between star systems, though they must be transported to the systems at sublight speeds (with physical limitations intended to prevent time travel).
• Several types of reactionless sublight space drive, including almost all of the types described by NASA's Breakthrough Propulsion Physics Program, though in the setting most of these are in the process of being replaced by various space drives based on "void bubbles".

[edit] Prominent fictional artifacts

Types of megastructure that feature prominently in the Orion's Arm setting include:

• Dyson spheres (shells around stars), both swarm-based and rigid.
• Ringworlds (rigid hoops around stars at a distance of about 1 AU).
• Bishop ring (large ring-shaped habitats), described as the largest spinning ring-shaped habitats that can be built using non-exotic materials.
• Complex orbital ring variants (suprastellar and supraplanetary shells) that perform functions similar to Dyson spheres.

Types of nanotechnology-based artifact include:

• Utility fog (swarms of microscale robots that act as a reconfigurable bulk material).
• Disassembler swarms (grey goo-like swarms of nanorobots that dismantle hostile craft/objects).
• Angelnets (nanotechnology-based infrastructures allowing for complete control of the local environment, up to and including mind uploading in the case of severe accidents, that provides functional immortality in addition to its holodeck-like uses).

Other noteworthy artifacts are usually unique items whose principles of operation are unknowable to "baseline" humans (named Clarketech, after Clarke's third law).

[edit] References

[edit] See also

• Transapient

[edit] External links

• Homepage
• Mailing List (Note: requires Yahoo! membership to view messages).
• Voices: Future Tense - ezine for Orion's Arm fiction, art, and commentary
• The Orion's Arm Universe in Celestia A series of add-on s for the Celestia program to display Orion's Arm planets, spacecraft and other objects
• Introduction page
• Full text of a conference paper about suitable light sources for Bishop Rings, from SPIE's non-imaging optics proceedings.