Image from Wyrmshadow
- Gaia Engelbrech - Text by Thorbjørn Steen
A virtual world located inside a moon node near the fringe of Keterist space.
- Galbydeia - Text by M. Alan Kazlev
MPA Middle regions system, home to the megascale engineering project known as the Galbydeia Torus.
- Galbydeia Torus - Text by Anders Sandberg
Mutual Progress Association space-time engineering project.
- Galilean Moons - Text by Stephen Inniss
The four largest moons of Jupiter: Ganymede, Io,Callisto and Europa. They were discovered by Galileo in 359 BT (1610 c.e.), and became important industrial and population centres in the Interplanetary Age.
- Gamma Hyeidon IV - Text by M. Alan Kazlev
Center for Galactic Folklore and Mythopoesis.
- Gammergan - Text by Steve Bowers
Former lost colony in the MPA Ophiuchus Region.
- Ganymede (Sol V - iii) - Text by M. Alan Kazlev
Major satellite of Jupiter.
- Garell - 70 Ophiuchi II - Text by M. Alan Kazlev
Gas giant, home of a number of posthuman keterist clades. See also Barawatten.
- Garlin - Text by M. Alan Kazlev
Negentropist world in the vicinity of Lynga 7 - home of Yarr Mak Po 4+ and the original YarrMakist doctrine.
- Gatewai - Text by M. Alan Kazlev
Shared Metasoft-NoCoZo world in the Inner Sphere - famous for an appearance of the so-called "Femtotech Messiah"
- Gavit - Text by M. Alan Kazlev
Resource poor Outer Volumes system.
- Gayomart Protectorate, The - Text by James Ward
Stellarised Superjovian system in the Canis Major outer Volumes.
- Gegton X - Text by M. Alan Kazlev
Theocratic bureaucracy, one of the Five Capitals of the Negentropy Alliance.
- Germyn - Text by M. Alan Kazlev
Brown dwarf cluster; 8 LY from Ridgewell, occupied by Negentropist forces during the Version War.
- Ghane III - Text by Anders Sandberg
Gaian Type world originally of Hyl Op culture, now Solar Dominion
- Gilboa Reach - Text by M. Alan Kazlev
Important STC outpost and stargate plexus in the Serpens sector, consisting of a large L5 orbital swarm of habitats and a terraformed world, Gilboa, whcih is distinguished by its unusual and lush vegetation (a result of an earlier terraforming attempt where gengineered terragen moss and lichen hybridized with indigenous prokaryotes).
- Gillbank - Text by M. Alan Kazlev and Steve Bowers
Crucis Corridor Negentropist world subverted by the Neutral Way, declared itself the Disarchy Alliance, led by the Postscripts of Randomness, as a deliberate parody of Negentropism.
- Gliese 581 - Text by Steve Bowers
Multiplanet system in the Inner Sphere
- Gliese 667 - Text by Mark Ryherd
A triple-star system in the Inner Sphere
- Glim - Text by Mark Ryherd
Member system of the Doran Empire
- Golden Mesa - Text by M. Alan Kazlev
YTS 2293-3800031 X - near-periphery Outer Volumes world, location of The Circle of Time artifact.
- Goldilocks (70 Virginis b) - Text by Steve Bowers
Warm Jovian, named during the Information age (wrongly as it turned out, as the moons of this world are all too warm for easy terraformation).
- Googlehertz Virchdrome - Text by M. Alan Kazlev
Panvirt dyson, part of the Union of Virtual Aipolities , site of the famous "Meeting at Googlehertz" which established the Central Alliance.
- Gordelpus - Text by Anders Sandberg
Central MPA system, colonized by the Kathelian Confederacy in the 2700's.
- Gorgos - Text by M. Alan Kazlev
22 Lyncis, an industrial system colonised during the Dionysian Erotocracy by Gorgos-Jemsys Networks. It developed into an isolationist corporate-hedonist pharmacracy culture that persists to this date.
- Goto 34-394332 - Text by M. Alan Kazlev
Former home of the Mother of Machines. At the MPA-Negentropic border.
- Greesob, Greesob Sector - Text by Anders Sandberg
Located in the Cepheus expansion direction. The origin of the name is the Anglic "greedy sob", a highly derogatory term for an acquisitive being. This became a nickname of Eduaria "greesob" Ilyantov, a First Federation relativist trader. When his ship company several generations later was hired as linelayers for the Cepheus development, they took the chance of naming a few systems for their ancestors. The Greesob system would eventually become a significant local administrative center, eventually naming the entire sector.
- Greylag - Text by M. Alan Kazlev
Negentropy theocratic-monastic world; one of the Five Capitals of the Alliance.
- Grignard - Text by Steve Bowers
World in Puppis where the copygroup lifestyle has been particularly successful
- Gripler - Text by Steve Bowers
Dominion World- location of the Signal Lamp Incident
- Gritwald - Text by M Alan Kazlev
Resource-poor Centaurus sector Negentropist system with the ruins of a Paradigm dyson shell.
- Gshru - Text by M. Alan Kazlev
Home to a mostly seafaring abdicator civilisation of hermaphrodites, in NoCoZo territories. It is is apparently slowly developing on its own inside the restriction swarms surrounding the system.
- Guanche - a Lost Colony - Text by Steve Bowers
Colony in the Cygnus Expansion which was lost when that empire dissolved and regressed to Bronze Age technology
- Guiuu-89 - Text by M. Alan Kazlev
Out-of-the-way habitat in the Metasoft Pleiades, during the ComEmp period the great vec poet and memeticist Inner Enrastered Link Connection settled there.
- Guo-Shou Jing - Text by M. Alan Kazlev
Penglai Outpost settlement in Giclas 258-33 Main Belt.
- Gyanti System - Text by M. Alan Kazlev
Populous system in the Utopia Sphere with a large population of plant provolves
- Halcyon (20 Leonis Minoris) - Text by Todd Drashner
Inner Sphere system. Halcyon was an early member of the MPA.
- Halsokallan - Text by M. Alan Kazlev
Solar Dominion system in the Perseus Arm, fallen to the Amalgamation in 6760.
- Hammerstein - Text by Steve Bowers
LinnEnt colony, populated by engenerator technology
- Hansin - Text by M. Alan Kazlev
(YTS 2193 098 170 - I); Inner Sophic League Mercurian-Type planet populated by a few monk-vecs and a single ex-sunminer. The planet is famous for the orbital New Vulcan.
- Harbinger - Text by M. Alan Kazlev
Fractal Dyson, Nuiarkady Sector, Zoeific Biopolity.
- Harmonic-Resonance - Text by Todd Drashner
Double planet in the Sophic League Middle Regions terraformed by Edenese superiors in 2805.
- Harri Ho (cybercosm) - Text by M. Alan Kazlev
Cybercosm in the MPA, part of the Cyberian Countzerogibson Band of Computronium Civilizations, Tonkin Dyson, Djed Sector. Named after Harri Ho
- Haydrik Habitat - Text by Ben Higginbottom
Independent Banks style orbital sharing a system with the Negentropist Alliance.
- Hazard Hope - Text by M. Alan Kazlev
Located in the near outer volumes Scorpio sector - near the junction of Negentropist and MPA empires and the STC volume, Hazard Hope has been described as one of those unhappy border systems that everyone has a turn at claiming and ruling. Currently it is MPA, but has links and a wormhole to each of the three regions. There has been talk for some time of making it a Free Zone but each attempt is undermined by one or the other of the sephirotic proxy AIs.
- Heartland - Text by M. Alan Kazlev
Capital of the Communion of Worlds.
- HeavenWatch - Text by Darren Ryding
Vast Homo Superior habitat cluster in Archaipelago, ruled by the archailect UrchinStar. Descended from a splinter faction of the Argus Array.
- Hekufast - Text by M. Alan Kazlev
Home of the Deines, high socioeconomic subclade of Radiation Nation.
- Helios A, B, and C - Text by M. Alan Kazlev
Intra-Mercury Orbital bands, SolSys.
- Helix Orbital - Text by M. Alan Kazlev
Orbital complex in the Aries Vector cluster; origin of the vec Kja Observance religion.
- Henon - Text by Steve Bowers
Outer Volumes planet with independently sentient cities
- Henson - Text by Steve Bowers
Panthalassic waterworld containing extensive water-cooled cybercosm
- Hethus V - Text by M. Alan Kazlev
NoCoZo world where mecha combat by pregnant human females is allowed in the gladiatorial arenas, such combat is generally given a separate class since it carries such an advantage (thanks to increased reaction time). And even on Hethus the rules limit female baseline pilots to a maximum of three full combat-pregnancies. Any additional pregnancies must be accompanied by a leave of sabbatical from the arena (old law).
- Hhrraiirah - Text by M. Alan Kazlev
(Sophic League) The home of the Hrruuaiih Sufant clade.
- Hibra - Text by M. Alan Kazlev
Crucis Corridor world, where Stig Ranes is revered as a martyr and culture hero.
- Hiederia - Text by M. Alan Kazlev
A backwater system in the Perseus Rift, shared between the Solar Dominion and an Independant postneumann civilization
- Hightower - Text by Todd Drashner
Primary world within the Deeper Covenant Realm. A gas-giant world with megascale dynamically supported towers.
- Himmelsschmiede - Text by Martin Andreas Cieslik
Heavy industrialized system in MPA space - One of the largest Deep Well industrialized Zones that ever existed in the terragen sphere.
- Hinton - Text by M. Alan Kazlev
Newly rich developing outer sphere world, important regional center, linked to main wormhole nexus. Popular with a number of clades, including young House Stevens radicals disillusioned with "House Ridgewell".
- Hipparkos - Text by M. Alan Kazlev
Important NoCoZo system
- Hoopworld - Text by Steve Bowers
Torus shaped metastable artificial solid planet
- Horsehead Nebula - Text by Steve Bowers
Dark Nebula in Orion
- Hoshanti's Star - Text by M. Alan Kazlev
Solarian designation for Gavit.
- Huan Gao - Text by Steve Bowers
Smoke Ring (Niven Cloud) in the Utopia Sphere
- Huanghua - Text by Steve Bowers
Huanghua, Yellow Flower; part of the Penglai Empire
- Hubble's Variable Nebula - Text by M. Alan Kazlev, amended by Steve Bowers
Variable Nebula: 2.5 Kly from Sol - site of important Metasoft Second Vec War victory over superior biont forces.
- Huycau - Sitr'achra - Text by Radtech497
Binary System with unusual xenosophonts.
- Hwii - Text by Anders Sandberg, M. Alan Kazlev and Steve Bowers
Zeta Tucanae II - The first purely dolphin colony world.
- Hynkarion Cluster - Text by Anders Sandberg
Local name of a small cluster of bright stars in the sky of Sullivan, which was colonized by formerly MPA clades in 5690. The Hynkarion worlds are known for its daring biotechnology/landscaping projects, especially the Monster but also the ice-cities on Alpha Hynkarion II and the sentient mats of Delta Hynkarion IX.
- Hyperion (moon of Saturn) - Text by M. Alan Kazlev
One of the moons of Saturn, Hyperion is the largest-known irregular-shaped body in the Sol System. It has a variable rotational period and a cratered surface.
- Hyperion (world) - Text by M. Alan Kazlev
(formerly Lunth) - Middle Regions world, Sol-ward of the Perseus rift, former capital of the Empires Age Hyperion - Marabi Patha empire.
- Hyttinen - Text by M. Alan Kazlev
Important NoCoZo system.
Text by Orion's Arm Editors
Initially published on 31 December 2007.