Image from Wyrmshadow
- Oceanus Ultimata - Text by Todd Drashner, with some comments by M. Alan Kazlev and Anders Sandberg
Star in Carina Outer Volumes surrounded by an apparently artificial water ocean-ring.
- Oh-F-Star-4 - Text by M. Alan Kazlev
The capital of the Carina rush. Contains a wormhole of alien origin spanning three thousand light years and connecting to a system in the direction of the Carina Nebula.
- Oia (Here) - Text by Steve Bowers
Oia, a predominantly cyborg world at the edge of Sophic League space.
- Oikoumene Dyson - Text by M. Alan Kazlev
MPA dyson swarm at Zeta Serpentis.
- Oquendo - Text by Omega Tyrant
Three terraformed Mars-like worlds.
- Orinoco (Lambda Serpentis) - Text by Anders Sandberg
Lambda Serpentis. Unsuccessfully terraformed world, now Cyberia Sphere.
- Oro Mistral - Text by D. David Barbeau
Utopia Sphere whale and dolphin world.
- Orobon - Text by Steve Bowers
Xenoterraformed world orbiting a white dwarf; a part of the so-called Garden of Paradise Cluster.
- Orwell (Garden World) - Text by Anders Sandberg
Capital System of the Chronos Cluster.
- Oshiq - Text by Steve Bowers
Outer Volumes post-gaian world.
- Osiris - Text by Steve Bowers
HD 209458b Hot evaporating EpiStellar Jovian world.
- Osto - Text by M. Alan Kazlev
AI-governed autopic Utopia Sphere world famous (or notorious) for the invention of Pourmurmide, to which most of the populace still remains addicted.
- Outland - Text by M. Alan Kazlev
Enterprise 43-V. Early discovered chlorine ecology. Orbits a red dwarf in Andromeda, 90 light years from Sol.
- Outpost 5478 - Text by M. Alan Kazlev
TRHN world, one of the centers of the Artists of Gleia.
- Owen (System) - Text by PortalHunter
System containing Owen, the homeland of a number of species of Dinosaur provolves.
- Owidraramar (AB Aurigae b) - Text by The Astronomer, Dangerous Safety
- Ozymandias (world) - Text by Steve Bowers
Vela Sector - NoCoZo. Capital world of the Genen gas-giant extremophile superfamily the Premacy.
- Pacifica - Text by Anders Sandberg
Beta Virginis IV former capital of the Virginis Combine (originally New America).
- Padro Padro - Text by M. Alan Kazlev
Polity and solar system, Moravec Plexus, nominal STC. A Xeon called Green Dragonfly God has established a cult of worshipful nearbaselines (most with some dragonfly rianthism) in and around the region.
- Pandya (Mu Cassiopeiae) - Text by Steve Bowers
Mu Cassiopeiae; a seedship colony almost lost because of immunology deficiencies.
- Panthalassa - Text by Steve Bowers
Waterworld in the Zoeific Biopolity.
- Panvirtuality 1 - Text by M. Alan Kazlev
An A-lass star ringed by computronium megastructures and matrioshka dyson; the first Solipsist Panvirtuality to be examined in detail by a First Federation exploration swarm.
- Panvirtuality Ultima (Zeta Ophiuchi) - Text by M. Alan Kazlev and Steve Bowers
Zeta Ophiuchi, O-class blue giant ringed by computronium megastructures and matrioshka dyson. One of the largest Panvirt systems. At 480 ly distance, this is the closest O type star to SolSys.
- Parallax (world) - Text by Anders Sandberg
MPA planet in the Erdece volume. While the surface is almost totally desert, the water in the notably high atmosphere forms several impressive cloud layers. A popular vacation spot for various aerial sports, famous for the skycities and the Parallax Immunological Institute.
- Pardes - Text by M. Alan Kazlev and Steve Bowers
HD 190605 I, the former Cygexpa capital. A pleasant earth-like world 145 light years from Sol.
- Paula - Text by M. Alan Kazlev and Steve Bowers
(YTS-5456111-003-II; Metasoft Version Tree Volume), home of the Xenosophont Paulans.
- Paz (59 Draconis) - Text by M. Alan Kazlev
59 Draconis - Inner Sphere Culture-System established during middle First Federation period.
- Paz (Morpheo Ab) - Text by M. Alan Kazlev
Second Planet of the G-class star Morpheo A Colonised by the Pazists under Jon N'mabbo. Taken over by the Efficiency Maximization Paradigm. Planet optimized and dismantled before 7430.
- Pelion and Ossa - Text by Steve Bowers, with suggestions from Radtech497 and l0b0_t0mmy
Two small terrestrial worlds which collided in 9526 AT.
- Pen-y-Ghent System - Text by Steve Bowers
Mutual Progress Association middle regions system; includes the Ribblehead Societeum World.
- Penglai - Text by Anders Sandberg and M. Alan Kazlev
Sigma Draconis colony settled by Chinese colonists.
- Pentagon Moons, The - Text by Mike Miller
Highly modified system in the Metasoft Outer Volumes. Location of an oddly arranged set of baseline reserves that have a tragic history.
- Perdix - Text by Steve Bowers
Terraformed terrestrial world in an eccentric orbit.
- Pereira - Text by Anders Sandberg and M. Alan Kazlev
Cygnus Sector, Outer Volumes, system, former capital of the Biovirate, conquered by the Keter Dominion following the Keterist-Biovirate war, attacked and sterilised by rogue bio-Autowars, currently lightly populated by a number of disparate clades.
- Perihelion (world) - Text by Todd Drashner
Mercurian Solar Dominion world with a highly developed evolved mechosystem.
- Perileia 76 - Text by M. Alan Kazlev
Middle Regions solar system, originally claimed by the Taurus Nexus, visited by Gorg as part of a a long-range relativist colonization venture. Captured by the Dominion following the breakup of the Nexus, in turn captured by Metasoft drones during the Version War, currently a Metasoft system. There is a monument and museum dedicated to the tragic story of Kibfrey and Gorg, and the system is part of the Kibfrey and Gorg Pilgrimage circuit.
- Peta Dromanis - Text by M. Alan Kazlev
12 Ophiuchi Minor non-aligned Inner Sphere system, its only claim to fame is that it was the birthplace and home of Admiral Tka Lett-Vorek, the commander of the Interplanetary Combined Fleet.
- Phobos - Text by Daniel Eliot Boese and Mark Ryherd
One of Mars' two natural satellites. Little remains of the original Phobos.
- Pluton - Text by Steve Bowers
Capital of the Pluton Volume, Perseus Prefecture Solar Dominion / Muuh Border. Depleted former ice giant - now an ice core world. Home to many cold adapted clades and xenosophonts.
- Pnas Greenen - Text by M. Alan Kazlev
A minor colony world in Monoceros Outer Volume region, original home of the infamous Equaliser Civilisation , now trying to forget its unhappy past.
- Polaris - Text by Steve Bowers
Delta Cepheid-type star in the Solar Dominion.
- Polonius - Text by Anders Sandberg
One of the member worlds of the Refugium Federation.
- Polyanna - Text by M. Alan Kazlev
Home to the Institute of Applied Hermeneutics, NoCoZo.
- Popejoy - Text by M. Alan Kazlev
Populous Solarist system, about 60 LY from the Dominion/MPA border. The ihabitants are for the most part only very nominal Solarists.
- Porrima - Text by M. Alan Kazlev
Twin stars where the first high technology non-Terragen artifact — a derelict alien starship — was discovered in 3752 by the Virginis Combine ship Fra Angelico. The system is currently Solar Dominion protectorate inhabited by a number of bioid and cyborg clades. There is a small but well-equipped Exoarcheology Institute, and a highly accurate reconstruction of the Fra Angelico, along with a superficial reconstruction of the artifact, is a popular tourist attraction.
- Positive Heading - Text by M. Alan Kazlev
An important Metasoft system.
- Potato (Asteroid Habitat) - Text by Mike Miller
An asteroid habitat in the Bonfire System
- Praxis-Gnosis (Epsilon Indi B) - Text by Todd Drashner
Epsilon Indi B. Inner Sphere brown dwarfs, Deeper Covenant worlds and major relay node of the Deeper communications network.
- Procyon (Alpha Canis Minoris) - Text by Mark Ryherd
F star system 11.4 LY from Sol; part of the Diamond Belt.
- Proden - Text by M. Alan Kazlev
An important Metasoft world.
- Prometheus - Text by M. Alan Kazlev (after original concept by Anders Sandberg)
A planet in the Zeta 1 Reticuli system, the original center of "Ufer" culture.
- Prospera - Text by M. Alan Kazlev
Important NoCoZo system.
- Proxima Centauri (Alpha Centauri C) - Text by Updated by The Astronomer with contributions by Dangerous Safety and Ryan B (Rynn) (2021)
The closest star to Sol, part of the Cenaurinume multiple star system. An ancient Nauri system.
- Proxima Centauri (Alpha Centauri C) - History - Text by The Astronomer (2021)
History of the Proxima Centauri system.
- Purcell - Text by Steve Bowers
Type 2 shellworld inside a Neptune-type planet
- Puysha-Para - Text by M. Alan Kazlev
Advanced Sophic cyborg ashram civilization, polity and partial dysonic M-class star system. They are connected to the Nexus and the Beamrider network and helped the Anandayannas gather allies for the Anandayanna-Uvartarasha War (Kuranaba is about 25 LY distant). Population is 123 million sophonts.
Text by Orion's Arm Editors
Initially published on 31 December 2007.