Latest Updates

Image from Tasp

February Updates

Hippocrates 27, 57 AT (February 28, 2026)

New and updated articles

Second Vec War - (Data panel) by Nyeti

Protean transport infrastructure by Liam Jones. Additional material by Rakuen07, Todd Drashner, Steve Bowers

Protean Manufacturing Infrastructure by Liam Jones Additional material by Grawa427

New Images

Space Hulk Chasers by Tanielu The Little Boy

Space Warfare by Tanielu The Little Boy

GAIA Ark by DSPE

Pacifica Habitat by DSPE

Ringworld by Starscapion

Anomalocaroids by Steve Bowers

Harren sculpture by Bassoeg

Sophants playing waveball by DSPE

Crustacean Burmies having iftar by DSPE

Goliath Playing Cards by DSPE

Fractaroni Spaghetti worms by DSPE

Crab Provolves playing TopoGo by DSPE

New Fan Videos:

A hard science fiction world, a weapon used by future humans and artificial gods. by Delusion Drivez (Korean and English Translation)

Sci fi stories: Orion's Arm Universe Project Short Timeline and Introductions By OrionsarmStories

New Fan Website:

Korean-speaking OA fans can now read most parts of the OA website, translated into korean with AI tools and built by dan10_09.

Korionsarm

January Updates

Galilei 27, 57 AT (January 31, 2026)

New articles

Achird A+B (Eta Cassiopeiae) by Steve Bowers

Kilburn by Rakuen07

Ice Belt Drifter by Libyan Muuh

New images

Pelion and Ossa Simulation Collision by Miyuwiauthor

The Gods ourselves by Tasp

Dolphin cyborg by Worldtree

Dyglusfare by DSPE (image + downloadable 3D model)

Phitons by DSPE

Pioneer Calendar by Steve Bowers

Architeuthis by Steve Bowers

Spinosaurus by Steve Bowers

kacimba by Steve Bowers

Hhrraiirah by Steve Bowers

Clarkers by Steve Bowers

Expiationism by Steve Bowers

New Fan Video:

Humans have finally crossed the line: Cyborgs by SF Duck (Korean and English Translation)

Image from Worldtree

We have merchandise again! The store for Orion's Arm T-shirts, Mugs, Hats and other items is ready and online!
https://www.zazzle.com/store/orionsarmuniverse/products The link can also be accessed under the SHOP menu of the OA main page.

Feel free to propose other designs through Discord or the forums if you want specific OA designs not found in this store, or want the digital file to produce a design for personal use through a local printer, if shipping is an issue in your area of the world.

December Updates

Faraday 24, 57 AT (December 31, 2025)

New and updated Articles

Beamrider Network updated by MiyuwiAuthor and Todd Drashner

Interstellar Colonisation Before the First Federation Era updated by MiyuwiAuthor (updated dates and locations)

Macrystis notable clades update by Banelord, Salty, TSSL, Jay the Tardupod, Worldtree, Nomad

Oceanus Ultima (update) by Steve Bowers, Todd Drashner, Borklord, Liam Jones, AstroChara

New Images

Christmas images by Tasp

Alseids by DSPE

Adumbrans by DSPE

Keruing by DSPE

Plant Sophonts by DSPE

Provolved Reef Squids by DSPE

Caleb with biotech hands by Steve Bowers

Travel Pod by Steve Bowers

Clarketech Hunters by Steve Bowers

Godchasers by Steve Bowers

Pearlhairs, (Supporting Minds in the Red Star M'Pire) by Marshmellow Winter Hoiday

Rainbow Bubbles and HaRoNa by Marshmellow Winter Hoiday

Asteroid Mining Truck by MrOnyx

Dolphin cyborg by Dreamy Cuddles

Doran Empire by Tasp

Mantle of The Judge by Tasp

Low Worldhouse Animation by Tasp

Gelbot and Siberoo by p01s0n1v0ry

New Fan videos

The reason why humans have no choice but to change their physical bodies (Tweaks) by SF Duck (Korean and English Translation)

A perfectly replicated Me :Mind uploading by SF Duck (Korean and English Translation)

Santarchai Carol by Miyuwiauthor

Its all for You Song by Miyuwiauthor (lyrics here)

November Updates

Einstein 21, 57 AT (November 30, 2025)

New and updated Articles

Hyvixnym by Starscapion

Milky Way update by Astrochara

New Callisto by Borklord

Valdern Megastructure by Steve Bowers

New Images

Retro Green landscape (Aolai) by Inkoalawetrust

Utility Fog by Tasp

Excelsior incident Flag and Monument by Tasp

Ken Ferjik, new portrait by Steve Bowers

New image for First Vec War by Steve Bowers

New illustration for Heavtal by Steve Bowers

Sol Niger of the Alchemists by Steve Bowers

Wingpacks, by Steve Bowers

Aruan sand-dancing image and 3D model file by DSPE

We have updated the OAUP's guidelines regarding the use of "AI"/generative software in contributions to the project. You can find the specific updated text on the following pages at the links below:

EG Entries
Fiction
Artwork
Please look them over and let us know if you have any questions or concerns.

The Editors are currently in the process of updating the website/EG to bring them into alignment with these guidelines.

October Updates

Darwin 19, 57 AT (October 31, 2025)

New Articles

Non-Luminary World Classification Scheme (update) by Astrochara
- Jovian (update)
- Frigidian (new article)
- Cryonian (update)
- Psychronian (update)
- Mesonian (new image)
- Zestonian;(new image)
- Pyronian(new image)
- Calidian (update)
- Asteroid (update)

Immunity (Virch) by Tasp

Manus Dei- Hand of God (Update) by Todd Drashner

Asteroid Habitats by uvnl00910

Sooboo (update) by Worldtree and Rakuen07

Esperis System by Steve Bowers

::GN- Second Coming of the Santarchai - Comments:: by miyuwi

New Images

Octoperiors by DSPE

Nanobot diagram (Drytech/Hylotech) by Inkoalawetrust

Akilaspek Trees,Fourier Perception Enhancement, Genius Locus (House Fab) by Steve Bowers

Clarktech, Topogo, Cluenes, Near-Baseline Human, Liunie Nux (Nearbaseline Human Genemods), Ree (Personalities),
Fast Zerrin (Famous and Historical Modosophont Personalities) by Tasp

New Fiction

Happenings on the Quasi-Generational Ship Rabelais by InterstellarSleeper ;

New Fan videos

Cosmic War of the Artificial Gods Finally Begins (Orion's Arm for Experts) by Delusion Drivez (Korean and English language audio and subtitles)

Orion's Arm - The Graveyard of Charn - An Alien Mystery - video by John Castillo

Want to write an article or a story set in OA? Think you can improve something? Post it on the main forums or talk about it on Discord :)

September updates

Copernicus 16, 57 AT (September 30, 2025)

New and Updated articles

Green Shell (World) by Rose

Impulse Grid by Liam Jones

Interstellar Boostbeam (Update) by Liam Jones

Armored Fighting Vehicle (Update) by InKoalawetrust

Vacuum Balloons (Update) by Liam Jones

The Fragan Sphere (update) by Steve Bowers with suggestions by Borklord

Atomic age (update) + image by Inkoalawetrust

Extended World Classification System (EWoCS) (Update)
Frigidian class added, some fluid type prevalences adjusted by ProxCenBound after discussion with The Astronomer, ahead of planned revision.

New Art

Biovirate Logo by Tasp

Mahara Benisol by Tasp

Edible Table by Tasp

Claymore Mine by Tasp

Nanotech scale by Inkoalawetrust

4 Perseus Princes Icons by DSPE

Cumulous - (world image) by Steve Bowers

Fan videos

Future humanity that turns imagination into reality by SF Duck (Korean and English Translation )

The muuh taboo by MiyuwiAuthor (English Language)

August Updates

Hoygan Stallt and the Out-And-Back by Tasp

Keeping Places by uvnl00910

Perseus Princes by DSPE and Nyeti with contributions from Borklord, Chara, Todd Drashner, Grawa427, TSSL, Rakuen07, Steve Bowers

(Data Panel Expanded from a short article by DSPE, Grawa427, Nyeti, Rakuen07 in May 2025)

New Art

Cthonoids by Doktwo

Vots by Worldtree

A virtual robot (Vot) by Steve Bowers (Bottom of page)

God Dwellers by Oddity

Encyclopedia Galactica by Tasp

OA Logos by Steve Bowers

Banach angels by Galaxiel

Fan videos

Mystery and Catastrophe: The Duality of Space Exploration [Orion's Arm, The Outer Realms] By SFDuck (English and Korean Language)

Orion's Arm: The Whole History By SFDuck (SFDuck1969) (English and Korean Language)

Happy Tranquility Day! (Anniversery of the Moon Landing, 56 AT /July 20, 2025)

Image from Orion's Arm Contributors

The future isn't here yet. But don't worry. It will be. Today is the beginning of the new year in the Tranquility calendar!
This project began 25 years ago and each year has grown in more fascinating directions. Thank you to everyone who has been engaged with the OA universe over the past two and a half decades, and to everyone who will be involved for years to come!

July Updates

Archimedes 11, 57 AT (July 31, 2025)

New and Expanded articles

Zoeific Biopolity data panel revision By Todd Drashner , Liam, Borklord, Rakuen, DSPE, Nyeti

Calendars and Timekeeping in the Terragen Sphere (update) by Steve Bowers

SN 1987A (Supernova) by Evil Dodo

Quantum Ansible by Andrew P.

New Images

Black hole Brains by Steve Bowers

ONeil Cylinder by Tharsis13

Fan videos

Why AI Destroyed Civilization [Orion's Arm, Post-Imperial Union Era] by SFduck (Korean and english language options)

Humanity Becomes Livestock of AI That Predicts the Future [Orion's Arm, Oracle War] by SFduck (Korean and english language options)

June Updates

Mendel 9, 56 AT (June 30, 2025 AD)

New/Updated Articles

Glarion the Glorious Conqueror comics by Jeonlibseon-am

Interstellar Era Anglish neopronouns by Astrochara

Terragen Federation data panel by Todd Drashner

Rak Mesba revision by Steve Bowers

Quantum Mechanics 2nd update by Andrew P.

New Images

Venus by The Astronomer

Solsys in 560: Venus by The Astronomer and Steve Bowers

Architeuthis by Steve Bowers

Handtech by Tharsis13, and Handtech by Steve Bowers

Dyaushpitr Interstellar ship by Zatoon

The Bureaucracy by Steve Bowers

New Fan Videos

Is War God's Will? -Orion's Arm, Endurance Sphere Era Part 2 by SFDuck (Korean language)

The war between the super empires over the protocol (Orion's Arm for Experts) by DelusionDrivez (Korean language)

Pentagon moons by John Castillo (English language)

May updates

May 31, 2025 (Lavoisier 7, 56 AT)

New and Updated Articles

Perseus Princes (expansion) by DSPE, Grawa427, Nyeti, Rakuen07 , Image by Tasp and Worldtree

Albireo - 3 articles merged by Steve Bowers

New Images

Astomi by Tharsis13

Cetacea cyborg orca by Tharsis13

Noyce Bishop ring by Tharsis13

Hov's'sa by Andrew P.

Walking Cities by Steve Bowers

Mudaru Orbital Swarm by Steve Bowers

Branton by LordOther

Tidal Heating by Steve Bowers

bAdmod, Cult of Gold, Goliaths, Resona, Von Neumann Sculpting, Circular Argument in a rotating Habitat by Tasp

New Fan videos

Why Humans Were Banished from Earth [Orion's Arm, Solar System Era] by SFDuck1969 (Korean language)

The Most Amazing Way to Travel Space [Orion's Arm, Interstellar Era] by SFDuck1969 (Korean language)

The Cosmic Order Created by AI [Orion's Arm, Inner Sphere Era Part 1] by SFDuck1969 (Korean language)

April Updates

Kepler 4, 56 AT (April 30, 2025 AD)

New and Updated Articles

Bioships expansion by Avengium, Worldtree, Rakuen

Bentharis by Andrew P.

Hov's'sa (HIE-015-PZE, the Bentharis II Civilization) by Andrew P.

Tkzeph Empire by Andrew P.

Interstellar Exploration rewrite by Todd Drashner, with comments by Steve Bowers

Singularity Levels (update) by OA editors

Federal Institute of Provolution by Rakuen

Lyra Co-op by Nyeti

Kacimba by MiyuwiAuthor

Rivers in the Sun by Tasp

Xenobiology and Natural History of Tohul by Text by Andrew P. , ProxCenBound, Immanuelle, The Astronomer, Dangerous Safety , James Rogers, Todd Drashner, Steve Bowers

Transvots (previously 'Slaved Hyperturings') by Proxcenbound, Steve Bowers, Grawa427

New Images

AIMHEM animated logo by Tasp

Alseids by DSPE

Comparative chronology chart by Banana Man

Hiiiw--waan-w, Cliff Dancing , Zeegrav-Ball, Apple Nebula by Steve Bowers

Siloen by Worldtree

New Fiction

The Anthropic Intermission - Short Story by Tangle10

Great Whale ISO vignette by Qualitum Dragon, (written 2018, added April 2025)

New Fan Videos

Orions Arm, the First Step into HardSF by SFDuck1969 (in Korean)

What god do you believe in? Orion's Arm for Experts Orion's Arm for Experts by Delusion Drivez
(in Korean)

Chlorine Biochemistry: Life in Hydrochloric Acid (in english) by MiyuwiAuthor

March Updates

Jung 2, 56 AT (March 31, 2025 AD)

New articles

Anurans by Josh Taylor

Body Transformation Protocols by Steve Bowers, Additional Material by Grawa 427 and Todd Drashner

Ecumenopolises by Steve Bowers, images by Tasp and Steve Bowers

Ecotaurs by Worldtree and Andrew P.

Titawin Xenological Garden by Liam Jones

Updated articles

Moodomorphic updated by Steve Bowers

Utility fluid - section Utiity foam by Steve Bowers

New Art

Arachnids having Lunch by DSPE

Aolai (Gamma Leporis) "Eight of the artificial planets in the Ao Lai system" image by Steve Bowers

Reva ring, Magal Worldrings, images by Steve Bowers

Substrate Shock by Keith Wigdor

Bathhouses, by Clockwork

Images by Tasp

Aron Tech, Biofixe Logo, Etodism logo, Glimpses of a Harren, Hawking's Not Here, Low World Houses, Negentropism Tenants in stone, Negentropy alliance logo, Meistersinger in Zero G, Mt. Thassthon, Seat of Judgement, Sagawa corporation logo, Tahmetian cross, Tilonian yacht-vecs, Ultratech, Undyoism logo, Yasamura Artificial Environments Corporation

February Updates

Hipparchos 27, 56 AT

New and Updated articles

How to contribute guidelines updated

Kinesians by Immanuel and Andrew P, with contributions from The Astronomer ,Todd Drashner, Steve Bowers, Dangerous Safety, ProxCenBound, Worldtree, Rakuen07

Quasar Dynamic Fleet updated by Steve Bowers

Titanian Sowers (HIE-236-PPE) by AstroChara and ProxCenBound

New images

Voss Culver-of-Bydovsky (Conver Ambi) by Doktwo

Daharrans by CM Kosemen

Quokka from the future by Rigel Regent

Almucantar cargo ship by DSPE

The Black Ring of Reva by Steve Bowers

Harren Hall by Tasp

Orbital League animated Logo by Tasp

Altair Knowledge Designs by Tasp

Glim (HD 223889) surface by Steve Bowers

Fragan Sphere by Steve Bowers

Little Garcia of Epsilon Indi by MiyuwiAuthor

Conver Ambi symbols by Tasp (bottom of page)

Archailect Landscape by Worldtree

OA Eye in Space by Worldtree

Downloadable files

- 3D models have been reorganized and added

Liquivore Tardugrade,
Cuddle bear,
Hov's'sa (all by Andrew P)

Muuh 3d model by Steve Bowers

January Updates

Galileo 27, 56 AT; 31 Jan 2025

New and Updated articles

Quantum Mechanics by Andrew P.

John E. Begood by MiyuwiAuthor

Unidentified Anomalous Phenomena by Steve Bowers

Vacuum Flora and Gardens (expansion) by Panchlora, Andrew P and Todd Drashner

Eganfodugbe (expansion) by Todd Drashner, Andrew P and Immanuel

The Silent Ones (expansion) by Andrew P.

Children of GAIA, Great Expulsion (updates) by Rynn

Maddison Brandenburg by Antigony_Trieste

Gengineering (merged with Genemod) by Steve Bowers

New Images:

Clade Faber by Tasp

Double World virches by Steve Bowers and Dreamup AI

Alphaism by Steve Bowers and NASA

Macrystis Filamentomycota by Jay the Tardupod

The Cultured Clown by Steve Bowers

New Fan Video:

Do you know hard science fiction? (Orion's Arm for Beginners) by Delusion Drivez (Korean, English subtitles) (edit: 216,000 views! as of march 2025)

Image from Tasp

December updates

Faraday 24, 56 AT (December 31, 2024)

Taxonomy and Xenotaxonomy by Steve Bowers

Oortwoods by keeperofbeesandtruth

Snowglobe Trees by Andrew P and Steve Bowers

Lamptails by James Rogers

Benisolism by ParrotRobot

Crystallographer's Nightmare by Liam, image by Steve Bowers

Crystallographer's Reverie by Liam

Siloen by Liam

Rewrite for Aardwolf Storms by Steve Bowers, image by Keith Wigdor

Images

Grapeship 1 , Grapeship 2 by Zatoon

Metropolis ring city by Galaxiel

Heaven and I Wept Together maze virch by Tasp.

Hygeras Object by Tasp

Jotuun by C M Kosemen

Wiisssnii planet image by Steve Bowers

Hhrraiirah (Sophant world) by Steve Bowers

Dendrosequoia sapiens Steve Bowers + AI

Biostasis by Steve Bowers

Wurm by Steve Bowers

Yggdrasil Bush by Steve Bowers

Virchology images by Uncle Sloppy + AI

November updates

December 1, 2024 , (Einstein 22, 56 AT)

The How to contribute guidelines for Encyclopedia Galactica submissions have been updated
https://orionsarm.com/page/551

New/updated Articles

Archailect-Creationism by Grawa427

Midnight Pearl by MyuwiAuthor

Marionette Template by Nuthenry2

Pioneer Calendar by Roge

Physiological Nearbaseline Mods update by Rynn

S'onah by MiyuwiAuthor

The Santarchai by Hermano_tastico, additional material by Andrew P. , Rakuen07, Worldtree, MiyuwiAuthor, Borklord, and Steve Bowers

Ultimate chips and Ultimate Salsa by Tasp and Worldtree

Images

Enhanced Dolphin by C M Kosemen

Animadvert by Tharsis 13

Acties (ray finned fish sophonts) by tharsis13

Otta the Aviviec by Clockwork

Cult of Gold by Tasp

Skyscrapers by Tasp

Spinning OA Logo by Tasp

Artisuns by Steve Bowers

Polyphemian type worlds by Steve Bowers

Wishing Box by Steve Bowers

FCL Disorder by Steve Bowers

Clade proteus selfie by Worldtree

Cathedral Mckendree cylinder of Benificence by worldtree

Orwoods by Galaxiel

Banks Orbital (habitable regions section) by Galaxiel

Smoke Ring By Galaxiel

October Updates

Darwin 20, 56 AT (November 1, 2024 )

New/ Updated Articles

Clade Proteus by Andrew P

Omega Point Theology by Andrew P., Steve Bowers, Vaktus and Worldtree

The Violets by MiyuwiAuthor and The Astronomer

Penrose Place By Liam

Warfare by Rakuen07, Worldtree, Andrew P, Todd Drashner

Jovian Class update by Andrew P

New Images

The Starlark by Zatoon image one :: image 2

NoCoZo LoGo by Tasp

Effector Frame by Tasp

Sand (World) dome ::Pantropy :: Virchology :: Binerator :: Astomi :: Octogen :: by Steve Bowers

September Updates

Copernicus 16, 56 AT (September 30, 2024 )

New and updated Articles

The Fargate, update by Grawa427 and Steve Bowers

Groombridge 34 by Worldtree, The Astronomer, MiyuwiAuthor, Steve Bowers

Heaven and I Wept Together by Tasp

Orbital and Rotational Elements by The Astronomer

Xenosophont Civilisations in the Laniakea Supercluster by ProxCenBound and The Astronomer, with contributions by James Rogers, Rakuen07, Ryan B (Rynn), Todd Drashner, Fsci123, Person43, Steve Bowers, MiyuwiAuthor, and Sandcastles

The Asteroid Diggers by Rakuen07

Muuh Cellular biology by Liam

Anomalocaroids by Andrew P

Ghosts of the Cambrian by Andrew P

Lazurogen Angst by Andrew P

Minor Articles

Chronicle (System) - Text by Andrew P
Cygnus Belt Leviathans - Text by Andrew P
Dinopark Institute (DPI) - Text by Andrew P
Neo-Cambrians - Text by Andrew P
Paleoworld Disney - Text by Andrew P
Spinosaurus aegyptiacus - Text by Andrew P

New Art

To'ul'ho'lo'ss tablet, Data Diamond by Tasp

Finity Box by Worldtree

Heartland images by Andrew P

Caving Drone, Security Bush, Pluton, Tablet Device by Steve Bowers

August updates

August 31, 2024 (Brahe 14, 56 AT)

Virtual robots (update),

Charactervots (rewrite),

Art Generator Software (update),

Carbon stars (update)

New Fiction

Halonic Symbiosis updated (by Selden)

New Images

Rotating Space Habitats :: Slaved AI :: Computronium :: Cyrus :: Wind Cave on Cyrus :: Luna (Lava Tube) :: The Alchemist Clade :: Megastructure Migration :: Travel Pod :: Wingpack :: Blanchard :: The Gods Ourselves ::

July Updates

August 1, 2024 (Archimedes 12, 56 AT)

New and updated articles

Consciousness (Phenomenology) (update) by Bear, Andrew P , Rakuen07, Steve Bowers, Rynn, Todd Drasher, Grawa427

Eridanus League (update) by the Astronomer

Keter (Archailect) (update) by Rakuen07

Soft Ones (update) by Liam Jones

Solsys Organization (update) by Rakuen07, Proxcenbound, MacGregor, The Astronomer, 1of3

Acts of Dialogue by Liam Jones

Barocapnic Life by Liam Jones

Riposte by Liam Jones

Scaramouche by Liam Jones

Caerwactod By Liam Jones

The Infinite Libraries by Terranova

Spica (Alpha Virginis) by The Astronomer, Steve Bowers, Rakuen07

Garden Worlds (updated) by The Astronomer, ProxCenBound, TSSL, and Banelord.

New Images

Diamondoid by Tasp

Hyraians by Steve Bowers and Bing AI

Festival of Sin by Steve Bowers and BingAI

Godwatchers/Godchasers by --AI and AndrewP

Vuxna map by Steve Bowers

Virds and Vats by Steve Bowers and BingAI

FAS logo animated by Tasp

Diamond Network by Tasp and Andrew P

Tipler Oracle (Oracle war) by Andrew P

Tribeminds By Steve Bowers and Bing Image Creator -

Audubon by Steve Bowers -

Tipler Oracle by Andrew P-

Contemplative Neverflux by Keith Wigdor and Bing Image Creator -

Rotacity by Ken York (external video)

June Updates

June 30, 2024 (Mendel 9, 55 AT)

New and updated articles

Excelsior Incident by Tasp
CRISPR by Andrew P
Archivists , (updated) by Steve Bowers and Bear
Thym Olep by Andrew P
Nadia (update) by Macgregor, with ProxCenBound and Steve Bowers
Kaana by Steve Bowers
Jarre by Extherian
Messier 67 by Steve Bowers
Methuselah (update) by Steve Bowers
Yottalator by Worldtree

New Artwork

Torch Drives, Beanstalks , Asteroids and asteroid mining, illustrations by Lily Harper
Worldhouses, Kja Observance illustrations by Tasp
Destructive Uploading, illustration by Avengium
Sybont, Bioborg illustrations by Keith Wigdor and Steve Bowers
Tar Vara Habitats ,Metamortalists , Immortalists , The Warpship that Returned, Shinogi, illustrations by Steve Bowers
The Black Acropolis by Andrew P

Lavoisier 7, 55 AT (May 31, 2024 AD)

New and amended pages

Bribery revised by Proxcentbound

CoreTechs Scandal by James Rogers

Digital Sophonts by Steve Bowers

::GN - Lazarus Longidae:: by ProxCenBound

The Laputan Cullings by James Rogers

Merging (Keith Wigdor art) by Steve Bowers and ProxCenBound from an original article by Anders Sandberg

Nucleosynthesis by Steve Bowers with an image by Grant Hutchison

Restored Ambi Limis by Extherian

The Screaming Bureaucrat by Rakuen

Restricted Virches (was Bottleworlds) by Rakuen and Steve Bowers

Archailectural mysticism by Avengium, Rakuen, and Worldtree

New images

Clade Cyborn

Skiiws'nnii (image of Homo delphinus)

Ridley Ridley

Garden Worlds (amended image)

Plantbot

Perfect Art (Keith Wigdor art)

Panvirtuality 1 (image of cybercosm) (Keith Wigdor art)

Syntech by Johnny Yesterday

Kepler 4, 55 AT (April 30, 2024)

New and expanded articles

Auto-Holding-Container by Rakuen

Ritual Cannibalism on To'ul'h Prime By James Rogers

Muora Supernova Event By Steve Bowers, Trolligi and James Rogers

Googlehertz Virchdrome by Steve Bowers

New images

The Sepulchre Variations, Cyberian Network (second image), Recursive Cybercosm by Keith Wigdor, Bing Image Maker and StableDiffusionAI

Thinsuit, Neptune, Tapestry of Mold Bioship by Steve Bowers

To'ul'h Cannibalism by Steve Bowers and Taf Media Studio

Jung 2, 55AT (March 31, 2024)
Farewell and thank you to Vernor Vinge, who inspired us for decades with his sci fi stories and immense imagination. May he Rest In Peace.

Updated or rewritten articles

Magnetar,

Dumbdo tech,

Maximum Toposophic Level,

Daemons of the Sidene

New Images

Vechedai toy image by Raptor on a Bicycle

Recor Hochent by WiseOldBaby

Sephirotic empire boundaries by Worldtree

Tir Sorcha, Muora Supernova remnant, Hoshanti's Star (Gavit), Orinoco, Carpetbeast , Airwall, Belters by Steve Bowers

Clade cromag, Bovid, Ken Ferjik by ArtbreederAI + Steve Bowers

Clade Fedhead, Clarkers, Ascension - Transcension Chasers by MidjourneyAI and Keith Wigdor

Enkidu Class Gametophyst by DallE3 +Avengium

Bremermann's Limit by DallE3 +Avengium

February 29, 2024 Happy Leap Year! (Aldrin Day, 55 AT)

New , updated or rewritten articles

Macrystis , Papercutters, The Savastos System, Cellulose Bane and the Tapestry of Mold by Banelord, Salty, TSSL, Martine, Worldtree, Schwefel Kamm, DocViviLeandra and 25 other contributors

Dance Don't Dream by Liam

Keter Dominion by Rakuen

New Mars updated by The Astronomer

New Images

Martian Tweak, Orwoods by Steve Bowers

Alfirk Panvirtuality Swarm, Transcension Machine, Transcension , Ascend-Transcend, Transcend-Ascend, Synthetic Humans, Multiversalism By Keith Wigdor and Bing Image Creator

Utility Fog -image by Zzang and Dalle3 Image Creator

Image from Tasp

Happy new year! in the Gregorian Calendar.

Galilei 27, 55 AT (January 31, 2024 AD )

New articles

Buddhabrain by Avengium

GrenRij by Trolligi and Steve Bowers

Multiversalism by Steve Bowers & ProxCenBound

Rewritten/expanded articles

Erotogens by Worldtree

Mabugana habitat by Worldtree

Mars by Macgregor

Meistersingers by Worldtree, Todd Drashner, Rakuen, ProxCenBound

Nivline by ProxCenBound

Carbon Stars by M Alan Kazlev, Cris Clowes and Steve Bowers

New Images

Archivists,
Isolates ,
Ordinatus III, by Steve Bowers
Bentharis,
Jupkai by Aaron Hamilton
Presence Chamber by Keith Wigdor

December Updates Einstein 22, 55 AT (December 31, 2023 AD)

New Articles

Heartland by Liam Jones

Nabla Biowars by Liam Jones

Personal Autopilot by Selden

Resonance-Trappist 1 History by Steve Bowers and The Astronomer

Iota Network by The Astronomer and Worldtree

Thiogen Plant Life by Liam Jones

Hiders by Rynn, Rakuen , Todd Drashner, Worldtree

Skywheel by Tardigrada

Updates/expansions

Menexenes -Menexene Pantropes section by Liam Jones

Magnetic drive by Tardigrada

Rocket Performance in pdf form with equations by Jagace

Rigel (update) + illustration by Trolligi and Steve Bowers

New Artwork

Nabla Biowars by Steve Bowers and Worldtree

Heartland diagrams by Worldtree and Liam Jones

Thiogen plant life by Steve Bowers

Skywheel by Avengium + Steve Bowers

Thiogen speculative variants illustrations by Worldtree

Muuh Iceship by the Okayguy

Ultratech by Keith Wigdor and Midjourney AI

Anttechians by Steve Bowers

Einstein 21, 55 AT (November 30, 2023,)

New Fiction

Halonic Symbiosis , an interactive fiction by Selden

New/Revised articles

The Final Cosmic Eating Establishment by Worldtree
Blefuscu by Worldtree (update)

Chaos wands by Todd Drashner (update)

TherapAIst by Teris (minor article) - see psychology

New Images

New illustrations by Steve Bowers
Raffin, Rak Mesba, Kariton, Ratakhtona- a Vedokiklek Industrial System, Vela Supernova Remnant, Envirosuit

Rinomolitic Matrix and Bioforges by Midjourney AI and Keith Wigdor

Keith Wigdor's Gallery (updated)

Darwin 23, 55 AT (November 4, 2023)

New Articles

The Maids of Trappist 1 by the Astronomer, Steve Bowers and Todd Drashner

Modified/expanded articles

Encyclopedia Galactica By OA editors and FFX
Trappist 1 planets — by Steve Bowers, The Astronomer and Trolligi

New Fiction

Reclamation by Macgregor (42,709 words!)

New Art

Vedokiklek by Steve Bowers

The Chronos Cluster - Quasar Dynamic Guild , The Hollerith Anomaly, The Biovirate, Klik by Midjourney, prompts by Keith Wigdor

Ringworld by Lilly Harper

GAIA's Lofstrom Loop by Operapoints

Copernicus 16, 55 AT (September 31, 2023)

Modified/expanded articles

Lyonesse, Europe , Academion by ProxCenBound

Dome habitats by steve bowers,

The Gods Ourselves

New Art

Hycean worlds by Steve Bowers,

A few more images by Midjourney prompted by Keith Wigdor, now on the site

Conver Ambi citizens, Polarizers, The Gods Ourselves, The Murmant, Ayan-4

Brahe 13, 55 AT (August 30, 2023)

New articles

The Olympus Pill by Idonai

The Fair and Foul Crew by Madine

Aerophants by Todd Drashner

GRACE by Rakuen

The Muuh Graveyard of Charn by Worldtree

Updated/Expanded Articles

Baryos (minor update) by ProxCenBound

Cosmic Amoeba update by Oliver and Steve Bowers

Sixth Toposophic (minor updates) by OA editors

Fargate by Steve Bowers

Technorapture Hypernation by ProxCenBound

Heavtal by Arrittrobi

New Art

Bioship illustration by Worldtree

Generation ship by Steve bowers

Pereira by Steve Bowers

Space Adapted Human by Steve Bowers

Dilmun climate models by Everythinga4404

Golden age and Technocalypse images by Clipstudio AI , prompted by Mstrongkiller

New images by Midjourney AI, prompted by Keith Wigdor
Finity Box , Transapientech, Mediators , Hive Mind

Archimedes 11, 55 AT (July 31, 2023)

55 years have passed since people set foot on our moon!

Happy Tranquility New Year!

New Art

Black Angel Attack by Operapoints Black angel, Void ships, Infanticide

Megastructure images by BNKirby /Custom-trained Stablediffusion

New images by Midjourney/Keith Wigdor (gallery) :: see also The First Vec War, The Silicon Generation

An image of a Saturn Bubblehab by Steve Bowers

Modified articles

Zoe of Hibbert expansions by Rakuen07

Pluton Volume (and the Epp War) expansions by Rakuen07

Sixth Toposophic modified by Proxcentbound/ OA editors

Temporary Bodies - Specialized bodies section by Extherian

New articles

Paintbox habitat by Steve Bowers

Topopolis (previously a stub article) by Tardigrada and Steve Bowers

Amethyst Habitat By ProxCenBound

The Editors will be focusing on rewriting/ expanding upon the Sephirotic Empires for the next 4-6 months. Feel free to join in :)

Mendel 9, 54 AT (June 30, 2023)

New Articles

Scutum-Crux MUUH1 signal

Updated/rewritten Articles

Ship Style and Decoration, Space Spiders

New Art

Images from MidjourneyAI+ Keith Wigdor:
Virtuals, Neurotechnology, Autofabricator, Genius Locus-House Fab, Pantropy, Technology

New story:

The Single Stage of Grief by Rynn

Kepler 4, 54 AT (April 30, 2023)

New Articles

Asteroid Defense by Mr. Onyx with new art by Mr. Onyx

Variable Gravity (VG) Sports by Drashner + New art by Worldtree+Stablediffusion

Cislunar Alliance by Macgregor (plus new flags)

Updated Articles

Natural History of Earth by ProxCentbound (merged from many articles by Alan Kazlev),

United States of America ,Canada

New Art

Extended Color Convention by StableDiffusionAI +worldtree+ Omeganian

Utility Sand & Rise of Homo Superior by Steve Bowers

Images from MidjourneyAI+ Keith Wigdor:
Aioid, Blight, Homo Superior Genemods, Genetekkers

Jung 2, 54 AT (March 31, 2023)

Updated/rewritten Articles

Rise of Homo Superior,

Godseed,

Political Science of Higher Toposophic Minds ,

Direct Neural Interface (3 articles merged),

0030 to 0130 AT: The Information Age,

Wup

"New" story:

The Tale of Cinska Daitan (7 chapters, ends on a cliffhanger/unfinished) by m.ellis
written 2016 , now up on the site.

Hippocrates 27, 54 AT (February 28, 2023)

New Articles

Star by the Astronomer

New Art

Wadai Ringworld maps (WD 0230-144) by Worldtree

New illustrations created by Midjourney Software + Keith Wigdor
Augmentation,Skeletoids, Laughter Hegemony, Exoself, Reproductive Technologies, Technotelepathy, Clarketech, First Toposophic - Basic Transapients, Fed Reps (Federation Representatives),

Updated articles

Languages and Linguistics , Inner Sphere, White Dwarf, & Wormhole Nexus by the Astronomer,

Intra-habitats (Ledges section) by Todd Drashner

Toposophics (The Gavatalamic Map section) + new art by Worldtree and Gabrielle of Gaussia

Data panel updates

Adhara (Epsilon Canis Majoris), Branswerg (Gliese 868), Dorangloon (Gliese 877), Ithiplumo (GJ 3379), Nova Terra, Orinoco (Lambda Serpentis), & Procylon by The Astronomer

Image from Michael Figarelli

December/January 2023 (Galilei 27, 54 AT)

New Articles
The Gigaverse by Crossroads + New image

Updated Articles
Virtual reality (now combined into a topic)

The Sephirotic Empires revised by crossroads + New Image by Vaktus

New images
Ocean of Ys Plankton illustration by Gabrielle of Gaussia

New Illustrations by Midjourney software & Keith Wigdor

We have chosen a new focus! Life on orbital habitats proved to be the most popular choice by ranked choice vote.
For the next four months the editors, and anyone else who wants to join in on the forums, will be focusing on this topic to add more details to the worldbuilding and expand our vision of what daily life within the grand megastructures of the sephirotics might be like. Everything from the smallest singlehab to the largest dyson swarm is fair game.

November 30, 2022 (Einstein 21, 54 A.T.)

Updated Articles

Anttechians,

by OA editors

Charlwood,

Hyperion by Crossroads, Rakuen07, Todd Drashner, and Worldtree,

Sagawa Corporation by Rynn

New Articles

Perseus Pirates by Macgregor
The Silent Planetarium by The Astronomer

New images

Sigmoid Ascension graph by ATMLVE
Toposophy, Toposophic Mindmaps

October 31, 2022 (Darwin 19, 54 A.T.)

Updated Articles

Nanomusic update by Crossroads

Ross 614 update by Datapackrat

The Silent Ones

Systems and Worlds

Shinogi update by Extherian

Biowar Egg+ Biowar (Merged)

Daharran Unity + Daharran (Merged)

The Hamilton Institute of Exopaleontology has given most extinct xenosophonts new names, in addition to their HIE designations

-The Terran Federation has been changed to the Terragen Federation throughout most of the EG.

New Images/Art

Animated version by MiyuwiAuthor of the Story "Mooclick the Muuh and the Time Machine" by Eric Lo (2011)

Want to write an article or a story set in OA? Think you can improve something? Post it on the forums or talk about it on Discord :)

September 30, 2022 (Copernicus 16, 54 A.T.)

New Articles

Magmatter Dreadnoughts by Ryan B and Todd Drashner

The Mensan Way by Extherian

Thunderbolt update and New image by Steve Bowers

New Images/Art

Downloadable+3d printable To'ul'h alien 3d model, by Taf Media Studio.

Orbital (habitat) by ATMLVE

Datacology by StableDiffusion

Virtual by StableDiffusion

Want to write an article or a story set in OA? Think you can improve something? Post it on the forums or talk about it on Discord :)

30 August, 2022 (Brahe 13, 54 A.T.)

New Images

World Of Forking Paths by EnstilAI

Window Washer bot by Zandeka

New Fiction:

More Things in Heaven by Todd Drashner

Full spreadsheet of all 174 OA stories with summaries and word counts
viewable here on the website.

30 July, 2022 (10 Archimedes, 54 AT A.T.)

New Images

Conical Rotating Habitats on Ceres, Adumbrans by Steve Bowers

New Articles:

Commskin , Symbiome & Inoffensive bodies by iancampbell,
Kessler Syndrome by Lemuria,

Come see how The Orion's Arm universe Project has grown and changed over the course of 21 years, with new links added at the bottom of The Early years Starting with snapshots at 2002, via the wayback machine

30 June, 2022 (Mendel 9, 53 A.T.)

Our Virtual worlds focus began this month ! Come join us on the forums to discuss and imagine what daily life in cybercosms might be like.

New Vignettes:

Travelers notes from the Herd Nation (Wadai ringworld, section 502) by Dfleymmes (Vignette #12)

& Two Virtual worlds vignettes (#8,9)

New Art

Gelbot by Zandaka

Akilaspek trees by Jonnyyesterday

A sunny day on To'ul'h by Dfleymmes

Urbanized solarpunk mckendree cylinder interior with Aztec Characteristics by Dfleymmes

Updated articles

Cyborgs by Todd Drashner, RynnB

Basement Universes (merged with Baby Universes) , Megacorps

31 May, 2022 ( Lavoisier 7, 53 AT A.T.)

New Art

Arkab Prior A by Steve Bowers

Bioluminescence on the surface of Taln by Steve Bowers

Pacifica Postcard by Arrittrobi (Added in section 'Pacifica joins the Utopia Sphere' )

New Vingettes:

Xil/Shamash by Madine
Shamash (Xi Boötis)

The Auvilhuveldt By Dfleymmes (art+vingette)

Interstellar Singleships by BNKirby

New Articles

Solsys Civil War Virch,
Trust networks

24 April, 2022 ( 26 Jung, 53 AT A.T.)

Artwork

Supramundane ring by Lilly Harper

Thick suit by Tharsis13

Avernus, the Queen of Pain's lair by Lord Phenkka

Belters by Steve Bowers

Video

My Path: a Journey of Cognitive Ascension, by Dfleymmes
based on the Snapshot 'My Path' by Rynn b

New Fiction

Snapshots

Gore Snapshot

New Articles

Kounzu Faashi (Nu Octantis) by The Astronomer

Owidraramar (AB Aurigae b) by The Astronomer and Dangerous Safety, New Image by Steve Bowers

Solipsism scams by Dfleymmes

Amended Articles

Aksijaha (Alpha Lyrae) , Alpamis (Pi Mensae) , Languages and Linguistics , Rajand (Lalande 21185)

1 March, 2022 (Hippocrates 28, 53 A.T.)

New Snapshots

Superior Genemods snapshot (by Ryan b)
Gillbank snapshot (by Dfleymmes)

Amended Articles

Second Federation Ontology has now been replaced with 'Concord Ontology'

'Second Federation Period' has been mostly replaced with 'Integration Period'

NoCoZo (Minor updates about the scale)

Great Houses , Ontology, Wolf-Rayet Stars

New Images

Illustrations from Tharsis13=
Muuh , Kriavuks

OA has a DeviantArt gallery

https://www.deviantart.com/orionsarmart

11 November, 2021 (Einstein 2, 53 A.T.)

New Fiction

Flamingo Gambits by Remy Zins on Smashwords, Part of an upcoming sequel to Oceans Untamed

New Snapshots

Augmentation snapshot (by Ryan b)
Interstellar Colonization snapshots (by Ryan b)

New Articles

Artificially Optimized Galaxies, Heavtal, Information storage

Amended Articles

Dorranok , Federation of Sophonts, Project frontier, Life extension

New Videos

Video Trailer by Šhådøw/Oneusorg of When You Put Away Childish Things...

You can find a playlist of OA content on YouTube here

Video Readings of the Timeline
Part 1 ,
Part 2,
Part 3,
Part 4,
Part 5

30 Jun 2021 (Mendel 9, 52 A.T.)

Check Out

Beacons in the Dark - Science Fiction website by OA contributor Lilly Harper

New Snapshot

Autofabricator (by Ryan B)

New Articles

The Trader :: Ran (Epsilon Eridani) - History :: Pneumatically Supported Structures (PSS) :: First Federation Emissaries :: Ran (Epsilon Eridani) in 770 AT :: Causal Fortress :: Logistics :: Fiber Habs :: Plasma Magnet Drive :: Purcell ::

Amended Articles

Wasat :: House Stevens :: Gatlida (Epsilon Indi system) :: Ran (Epsilon Eridani) System :: Luyten's Star :: Shellworlds :: Bubblehabs :: Wadai :: Amat Farm :: Sakura (59 Virginis b) :: Laser-launched surface-to-orbit craft :: Reality Intertextualization Project

New Images

Ramscoop and RAIR ships :: Dome Habitats :: Version War :: Luna :: Synthetic Parents (Parental Vecs) :: Fission Drives :: Keid :: Dorranok

28 February 2021 (Hippocrates 27, 52 A.T.)

New Snapshot

Smart Matter

New Articles

Space Runway :: Fusion Candle :: Stellar Propulsion Systems ::

Amended Articles

Star Lifting :: Gravity Tug :: Arcadia (Beta Comae Berenices) :: Neo-Helix :: Grek :: Copernicus (55 Cancri system) :: Danzig :: Yall-Ull (Gliese 667) :: Chloris (Beta Comae Berenices) :: The Kontore League :: Rheolithoids :: Wasat

New Images

Europa (Solsys) :: Europan Type World :: Hawking's Knot :: Jovian League :: Ramscoop and RAIR ships :: Dyson Swarms and Dyson Spheres :: The Gurth Hexanode Repository :: Bernal Sphere :: Paludial Subtype world :: Bubblehabs :: Occupations Avocations and Work :: Freesphere :: 0900 to 1200 AT: The Early Federation Age :: Fullairs

Image from Chris Shaeffer

14 November 2020 (Einstein 5, 52 A.T.)

New Snapshot

Ho'th'hss'lho (Politician)

New Articles

The World Garden :: Avanola :: Freedonia :: Sex and Sexuality

Updated Articles

The Extended World Classification System (EWoCS) :: Eostremonath and the Othelia System :: Gillbank :: Pyrothalassic Type Planets :: Morrow and Griqua :: Clade Cyborn :: Pandya :: Pyrohydrothalassic Worlds :: Negsoa: Mu Arae (Cervantes) :: Avatars Proxavs and Seraiphim

New Images

Memetics :: Vangelis :: BathyPelagic Subtype Worlds :: Huycau - Sitr'achra :: Hypatia

13 August 2020 (Archimedes 24, 52 A.T.)

New Fiction

A Funeral and Afterwards :: The Intersubjective Hive

New Snapshots

Hos'tho :: Botworld :: Syntech :: Bottleworlds :: The Lightways

The Orion's Arm Universe Project

Forum Culture :: Sandbox Settings

New Articles

Duxed (Garden World) :: Stevocations (Kepler-62) :: The Giant Ring of the Archsaur :: Anaximander (system) :: Jirayaka (Garden World) :: Benes (system) :: Tengri - (Kepler-9) :: Campbell Station

Updated Articles

Garden Worlds :: Synthetic Humans :: Superior Genemods :: Muuhome (system) :: Enhanced Uploads :: Darwin (Life-bearing World) :: The Tunh Xenohole :: Denathi Adepts

New Images

Tanhauser Garden World) :: Blue (Garden World) :: Rollerox :: Hwii :: The Surreal Rash :: The World of Meditating Idols

20 July 2020 (Armstrong Day, 51 A.T.)
Happy Armstrong Day!
51 years since Tranquility Base and Counting!

25 June 2020 (Mendel 4, 51 A.T.)

New Fiction

Ocean Untamed - by Remy Zins ::

New Traveller's Notes

Moltenceti - by Dfleymmes ::

New Snapshots added to articles

Astrology :: Cryonic Suspension :: The Doran Empire :: Epsilon Indi :: Fine Arts :: House Stevens :: Interactive food :: Nebula :: Rianths :: Modern Space Warfare :: Sufants :: The Surreal Rash :: Europans :: Europa

New Articles

H'tat'sa'thoss :: Proxima (Proxima Centauri) System :: Society of the Metempsykosids :: Seven Marbles (TRAPPIST-1) System - Pre-Colonisation

Updated Articles

Vangelis :: Caph (Beta Cassiopeiae) System :: Utility Fluid :: Benes (HD 17925) System :: Remagar

New Images

Enhanced Dolphins :: Alpha Jupkai :: Synthetic Humans

17 May 2020 (Kepler 21, 51 A.T.)

New Pages

The Extended World Classification System (EWoCS) :: Space Mirrors and Solettas :: Mass-Stream Technology (Space Fountains and Orbital Rings) :: The Uppalavanna Complex :: The Blue Star Dysons :: Niaanyo

Updated Pages

Vangelis :: Europans :: Ultimate Muscles :: Eunchong (Kang 021) :: PackRat Spores :: Dante :: Ultimate Vecs ::

New Images

Colony Ships :: Beneficence :: Terraforming :: Gliese 667 :: Enif Prefecture :: Poseidonal Subtype :: Europan Type World :: Aardwolf :: Europa (Sol V-ii)

3 March 2020 (Imhotep 2, 51 A.T.)

RIP Freeman Dyson

Mathematician, Engineer and inspiration for large parts of the Orion's Arm scenario.
A tribute by former contributor Isaac Arthur
https://youtu.be/sY203GvjPZc

New Fiction

Hunted by Ryan B ::
Snapshot: My Path by Ryan B ::

Amended Fiction

Heart of the Ice by Steve Bowers ::

New Pages

Ratu Mahendra :: Jinvanco :: Unnamed species: HIE019CZE

Updated pages

Particle Beam Weapons :: The World of Meditating Idols :: Darwin (Garden World) :: Trees (System) :: MyuvYin :: Shenjing (Sigma Draconis) System :: Ridgewell :: New Gaia :: Aristotle (Delta Pavonis system) :: April (System)

New Images

Omnicraft :: O'Neill Cylinder :: Marrowbone Armor :: Bubblehabs