Corona (Iota Piscium I )

Former Capital of the Taurus Nexus

Corona in the Current Era
Corona in the Current Era. The capital of the planet, Albertgrad, is clearly visible as a bright dot on the night side at the bottom left corner, while the University City locates at the center of the concentration of ocean floating habitats at the terminator, just off the western coast of Quark. Corona's auroras, twin orbital rings, and the famous aurora ring are also visible.

Corona (Iota Piscium I) Data panel

Parent starStar: Iota Piscium (Iota)
Spectral type: F7V
Mass: 2.287E30 kg (1.150 x Sol)
Radius: 1,109,642 km (1.595 x Sol)
Absolute magnitude: 3.43
Luminosity: 3.555 x Sol (bolometric)
Temperature: 6,288 Kelvin
Age: 5.2 billion years
Distance from Sol: 44.73 ly (2000 epoch)
See also main article on the Iota Piscium system
PlanetCorona Orbital characteristics (10600):
- Semi-major axis: 271,670,000 km (1.816 AU)
- Period: 833.5 days (2.282 Julian years)
- Eccentricity: 0.017
Physical characteristics:
- Type: GaianXeric (-1497) > EuGaian (1829-)
- Mass: 9.960E24 kg
- Radius: 7,637.0 km
- Density: 5,338 kg/m3
- Gravitational acceleration: 11.397 m/s2 (1.162 g)
- Rotation period: 69,774 s (19.38 hr)
- Solar day: 69,842 s (19.40 hr)
- Albedo: 0.38 (-1497) > 0.32 (1829-)
- Equilibrium surface temperature: 258 K
- Surface temperature: 290 K
- Obliquity: 17.3
- Surface pressure: 54 kPa (-1497) > 100 kPa (1829-)
- Composition:
before 1497 AT: 84% N2, 13% CO2, 2% Ar, 1% other
After terraformation in 1829-: 77% N2, 21% O2, 1% Ar, 1% other
Satellites (10600):
1) Sonata: Type: Selenian, Semi-major axis = 258,734 km, Orbital period = 11.729 days, Eccentricity = 0.032, Inclination = 15.214, Mass = 1.594E22 kg, Radius = 1,017.6 km, Albedo = 0.15
Polity, Government, and AdministrationName: Corona (Planetary State of Corona)
Symbol: The Radiant Crown. The current version was designed in 7235 during the early Corona Renaissance.
Capital: Albertgrad (political, cultural), University (academical)
Affiliation: The Iota Network, an independent archailect-led polity with close ties to various other polities such as the NoCoZo and Solar Dominion.
Colonized: The system was first reached in 1465 by Jupiter Transystems, but the planet was not extensively colonized until after 1471 when Piscium Development acquired the world.
AI overseer: The Academy Minds (a group of S2s)
AI ethos: Various, generally associated with the promotion of academic pursuits
Government type: AI-mediated cyberdemocracy
Administrative divisions:
Corona surface:
- Northern Quark
- Southern Quark
- Western Baryon/Glara
- Central Baryon
- Eastern Baryon/Gzeut
- Einstein
- Dirac
- Hadron
- Planck
- Western Fermi
- Eastern Fermi
- Western Bose
- Eastern Bose
- Schrödinger
- Lepton
Corona environs:
Cis-Sonata volume - Inner ring
- Outer ring
- Cis-stationary volume
- Trans-stationary volume
- Sonata
- Sonata-centric orbits
- Corona-Sonata L4
- Corona-Sonata L5
Other volumes:
Iota-Corona L4
- New Eureka
Iota-Corona L5
Population DemographicsPopulation (10600): 78 billion permanent (surface and orbitals)
Population breakdown (10600):
S0 - Modosophonts:
Terragen Bionts: 36 billion, of which over 95% have adopted superior versions of their clade.
- Humans: 14 billion
- Rianths: 6 billion
- Tweaks: 5 billion
- Splices: 5 billion
- Provolves: 5 billion
- Neogens: 1 billion
- Xenosplices: 50 million
Terragen Biont-AI Interfaces: 22 billion
- Virtuals: 15 billion
- Cyborgs: 5 billion
- Bioborgs: 2 billion
- Biaioids: 140 million
Terragen Sophont AIs: 20 billion
- Aioids: 12 billion
- Vecs: 8 billion
- Others: 10 million
Non-Terragen Sophonts: 90 million
- Xenoprovolves: 70 million
- Xenosophont Tweaks: (Aliens who are adapted to thrive in Terragen environments) 20 million
S1 - Basic Transapients: 30,578
- S1 Hyperturing: 18,495
- S1 Postbionts: 12,083
S2 - High Transapients: 302
- The Academy Minds: 256
- Unaffiliated: 46
Psyche, Art, CultureMetapsychology: Academic Meritocracy
Metaethics: Falsificationism
Religion/Ideology: Various
Culture and Art: Pragmatism, Ubuism
Official Language: Academic Coronese
Languages: Coronese (a systemic, complex constructed language meant to facilitate the conveyance of complex ideas and their relationships, with various dialects, including Academic, Baryonese, Quarkese, Glaran, and Sonatan) is the dominant language, but Hetami (a family of languages derived from the Jovian Creole, widely used on Hera and Hestia) is also widely spoken. Other Iota Network languages are occasionally used, and Solarese is mainly used in Solarist temples and Alemseged.
Timekeeping: Corona and its environs, including Sonata, uses the planet's own calendar, the Corona Calendar. The solar day is 69,842 seconds long, and is divided into 18 'hours', each 3,880 seconds long. 2 leap seconds are added at every midnight. The year is roughly 1031.124 local days long and is not divided into months, but rather referred to by order (Year 256, Day 512, for example). Leap year occurs every roughly 8 years.
Economics and InfrastructuresCurrency: Coronese Tera
Economic philosophy: Merit-based post-scarcity commons. Land and infrastructure are jointly owned by all with citizen dividends relative to academic performance.
Major Industries: Academic publishing, infotech, tachydidaxy
Military expenditures: Minimal
Megastructures: Two dynamic orbital rings, with space elevators linking them and the planet's surface. The outer ring has the 'aurora ring', a band of transparent screens displaying the aurora texture, hanging down from it.
Angelnetting: Varies from city to city, from virtually none to fully-angelnetted.
Interstellar Trade and Treaty RelationsMain trading partners: Most important Inner Sphere worlds, some of the empires, especially the NoCoZo.
Exports: Verified and peer-reviewed data, academic publications, academic appliances, and tachydidaxy technologies
Imports: Data from various projects from throughout the Terragen sphere, data about transapients and archailects, expert systems for local tachydidaxy
Corona Symbol
Image from Anders Sandberg and Avengium
The Corona Symbol, the Radiant Crown


1. History:
1465-1497: Pre-terraformation period
1497-1829: Terraformation period
1829-2450: Republic period
2450-3435: Taurus Nexus period
3435-4492: NoZoCo period
4492-4606: Solar Dominion period
4606-4830: Academic rising period
4830-4870: ComEmp host period
5300-5900: Dynamic worlds period
5900-6200: Magnetic reversal period
6200-7200: Thousand years static period
7200-7500: Corona renaissance period
9200-9300: New colonization period
2. Politics:
3. Economy:
4. Society:
5. Cultures:
6. Notable locations:
1) Capital cities
2) Regional capital cities
3) Historically important cities
4) Culturally notable cities
5) Other notable cities
6) Notable virchworlds

It's not every day I get to trade with a higher power, so when the message came through it took me several seconds to process its authenticity. Sirana and I had met that morning to go over some details in our manuscript. I'd gone virtual to join her in her workscape, the topology of the environment mimicked the symbolic logic of our project. To my senses it was a landscape of floating islands, each contained a factual statement, analysis or proposition. Bridges linked the islands to show relevant associations and allowing the veracity of each one, denoted by altitude, to drag its neighbours up or down correspondingly. I'd once peaked into how Sirana viewed it but lacking the sensory modalities for parsing extra spatial dimensions it just served to make me nauseous.

I'd been hiking through some flying lowlands where a dearth of accurate data was threatening to pull an entire section of the archipelago down into clouds non-significance. My exoself announced the message; an S1 entity known as NineStar claimed to have data relevant to our study. E was offering to release it so long as we donated funds to various other Coronese research tribes. I felt Sirana's mental presence, "Trust metrics are high. NineStar has been authenticated by system Archai and there is a record of an entity with that name travelling in the Third Loop Covenant." My point of view shifted to a cluster of well-connected islands representing our work on the TLC. Our project was an attempted reconstruction and sociological analysis of the so-called "Purple Flowering Renaissance"; a century long period that occurred in the Dwellunese orbital band in the Tag system, Tagant cluster.

Data about this period was sparse, partly due to the insular nature of the cluster but mostly due to the blight of 7112a.t. A failed S3 ascension gave rise to a blight that quickly assimilated everything in the Tag system and went on to devastate the cluster over the next few decades (before finally burning out, coincidentally just before impinging on sephirotic territory). The TLC had featured in our studies as a probable location of the Dwellunese diaspora, but no firm evidence of refugees or travelers had been found. NineStar's message claimed that E had encountered a Dwellun in that region and had acquired some memories encompassing the period.

Feeling like I needed some air I shifted perspective back to the Ril. I'd left my body basking on a slipway, the sun was just setting as the city floated further north with the rest of the Lovelace Flotilla. Dangling my feet into the sea I called up information on the groups NineStar wanted us to pay on eir behalf. There was a dizzying array with a range of public abstracts; the contribution of stringed instruments in high pressure environments to mathematic memes, theological analyses of Pith Guru dominance psychoware, sociocultural implications of rumoured archai femtotechnology, to name but a few. I ran a few programs to spot any pattern but as expected no significant link was found in the groups and no reliable predictions could be discerned if they had an increase in funding. Unsurprising if this all played into some transapient's plan.

Sirana's icon appeared before me, "what do you think?" I contemplated for a moment as the last light of the sun fell beneath the horizon. "Confidence is high, trust metrics are significant. Let's do it."

Except from "Retrospective analysis of the 8381a.t. NineStar Intervention"

Corona (Iota Piscium d) is a planet in the Iota Piscium system, also called the Iota system. The planet is orbited by a single large moon, Sonata. Corona is composed, by mass, mostly of oxygen (34%), iron (24%), silicon (15%), magnesium (10%), sulfur (3%), aluminum (3%), and calcium (1%). The planet is fairly magnesium-poor compared to silicon, and its mantle is mainly composed of silica-based rocks. Since magnesium-rich magma is less viscous than silica-rich magma, this results in a stiffer mantle and infrequent geological activities. The crust's thickness is often dozens of kilometers thick.

Although not part of the original ahuman-built wormhole network, Iota was close enough to both the burgeoning Taurus Nexus and the First Federation to be wormhole-linked to both; leading in turn to Corona rising to become the capital of the Taurus empire before its fall in 3263. The planet then joined the NoCoZo, was annexed by the Solar Dominion, and finally became an Iota Network world, independent from the major empires.

In the Current Era, Corona is one of the 'classic' worlds of the Inner Sphere. Although not as politically or economically powerful as Hera or Hestia, the two outermost planets of the Iota system, Corona is an ancient world rich in culture and history, and the planet is renowned for its brilliantly colored auroras, lively festivals and celebrations, and gentle academic atmosphere, which together gracefully drive the everyday lives of some 78 billion people who call this world and its environs home.

Corona before Colonisation
Image from The Astronomer
Corona before terraformation


Pre-terraformation period

When Jupiter Transystems arrived at Iota Piscium in 1465, they claimed the entire system, but focused most of their exploration, colonisation and development efforts on the two outer planets, Hera and Hestia. Corona was sold along with Eva to the newly arrived Piscium Development in 1471. More extensive explorations took place as the Development looked for a way to turn Corona into a habitable world. Vast underground reservois of briny water were quickly discovered, though no native life was found.

Corona was originally a desert world with a rather dense greenhouse gas-dominated atmosphere that, combined with the planet's fast rotational period, routinely generated powerful storms. Thus, the early colonization was mostly about building suitable habitats and cities, and massive arcologies with simple shapes were the most desirable. Beginning in 1473, several arcopolises, including Delphi, Albertgrad, and Heisenberg, were constructed on the surface, each initially capable of housing tens of thousands. The Ruth Duorkin, the Piscium Development fleet's first colony ship in the system, was placed in parking orbit. A rotating habitat was assembled around it as the spacecraft-turned-habitat was made capital of Corona, in 1486. The moon Sonata was also home to a sizable population, living in cities such as Haydn and Beethoven.

Terraformation period

The terraforming operation went rather smoothly. Asteroids and comets were redirected to add more volatiles to the dry world, a solar shade/power collector was constructed at Iota-Corona L1 to cool Corona down, additional nitrogen was purchased and imported from Hestia's Titanian moon of Delphi, and weather machines were deployed to regulate the planet's climates and strong winds caused by its fast rotation. Eva's swarms of power collectors near the star were leased, and for the next 200 years provided the energy required to crack carbon dioxide and water gathered from Corona's atmosphere, asteroids and comets into oxygen. One of the most important projects during this time was the geosculpting project. Initiated in 1523, it was one of the first known large-scale geosculpting projects, done to address the planet's topological issues.

In 1547, the capital was moved from the Duorkin habitat to the planetbound Heisenberg city. Meanwhile, different cities began to develop their own identity, and among them the academic cultures that later would define the collective planetary culture. During this period, biont families often had many kids to fill up the gigantic arcologies, thus in many cities, the population skyrocketed. By 1550, the biont population was already some 50 million.

When Corona was finally declared to have reached a self-sustaining state by 1829 with only negligible environmental engineering infrastructure remaining, it attracted attention from throughout the Terragen sphere, and people from various worlds flocked to this world, originally populated by some 1 billion people. The local Piscium Development governing entity soon evolved into the first government of Corona, the Corona Republic. The planet's capital was once again moved from Heisenberg to Delphi (city) in 1829.

Elsewhere in the star system, the colonists on the second planet, Eva, were constructing several power collectors, both for their own plan to turn into an amat superpower in the system, and to lease them for projects elsewhere in the star system. This became very useful later, during Corona's terraformation period. Meanwhile the many moons in the Hera system were vying for dominance and consolidation, while the Hestia system was united but still unable to defeat the Iota Minor Polities Alliance, an alliance created to protect the various small body polities from getting subsumed by larger ones. Since Eva's independence, it remained on good terms with Corona. Much of Corona's amat during this period and the next was imported from Eva. Athena (later known as Minerva), meanwhile, rapidly developed a culture that would become the current static and inward culture. Another important interplanetary event for Corona happened in 1646 when the New Eureka polity made a decision to join the Corona polity.

The Duorkin Complex
Image from Steve Bowers
The Duorkin Complex has grown around the original spacecraft, to include asteroids and rotating habitats

Republic period

Immigration to Corona was dominated by people from Sol, eager to live an 'authentic' planetary life. Instead of artificial constructs, these migrants preferred the vast new plains. However, it was not possible to create those 'planetary life dream' settlements fast enough for all of the waves of almost a billion newcomers, and in the end, very few of the richest people got the chance to live an 'authentic planetary life', and the rest were crammed into dense cities designed to maximize efficiency and minimize footprint. One region particularly impacted was Glara, whose refugee population exceeds 50% at various periods of time. By the beginning of 2000, the planetbound population of Corona was 3 billion, almost half of those were frustrated newcomers.

With immigrants from all across the colonized space living in close proximity, cultures from various star systems intermingled, mutated, and sparked a cultural blooming on Corona. Among them were the creation various constructed languages designed to facilitate cultural blending whilst fostering a native Coronese culture (a revival of this practice in later times would give rise to the famous Academic Coronese language family)

During this period, various problems plagued the planet, from crowded cities and crimes, to poorly packed ground from the geosculpting project (which mostly results in landslides and sinkholes, but in a string of linked cases over a period of few days, chunks of the mountain range at the eastern Gzeut gradually collapsed into the ocean, creating giant waves), to wars, either in ril or virches. Several Alto Stisboi infightings occurred on Glara, and propaganda wars and cyberwarfare were waged across the planet. Other forms of conflicts include terrorism and riots by dissidents against the local governments, especially in the 'immigrant cities'.

The Iota system in this period was a chaotic place, as major polities, including Eva, Corona, Hera (allianced under Eileithyia), and Hestia, raced to take over various dwarf planets, asteroids, comets, and other small bodies which broke away from the corrupted and failed Iota Minor Polities Alliance. Corona itself won a defensive battle over its sole major off-world claim, the Iota-Corona L4, containing New Eureka plus few other asteroids, against invading Hera combined forces in 2097. The arrival of the conversion technology in 2180 promised safe and plentiful power for all polities, including Hera and Hestia, both of which, if without Eva's amat farms, would had had to resort to fusion and whatever little amat they could scrape from their planets' radiation belts. As the result, the amat monopoly Eva used to hold was broken. It attempted to sabotage the conversion power generators, the attack of which was staunched and provoked a group of S2s overseeing the Hera system. All of Eva's power collectors were hacked and their amat containment failed shortly after, in some cases damaging cities. Hundreds of millions of refugees from all over the system fled to the relatively peaceful Corona, and were packed into the various immigrant cities, worsening the humanitarian crisis.

Towards the end of this period, various factors, such as the humanitarian crises, ideology clashes, and intervention from other polities, caused the Corona Republic to wane in power and various cities and territories seceded. Megacorps, who leased facilities in orbit for further exploration and colonization efforts, began to influence the planet, dividing it even further up.

Taurus Nexus period

The wormhole link to the Xi Geminorum, which was created by the ambitious local S3 transapient Hera Overseer, arrived in 2445 and changed the system completely. Several wormholes from important systems in the 'Virgo Nexus', including Alpha Mensae (Merrion), began to arrive one by one, and traffic increased dramatically. The Taurus Nexus government eventually relocated from Xi Geminorum to Corona in 2450, replaced the Corona Republic, and constructed a large orbital habitat at Corona-Sonata L4, dubbed New Geminorum, for the heart of the capital. For almost a thousand years the star system became prosperous. Ships arrived from various important stars to trade, and local businesses and corporations popped up, exporting the planet's vibrant cultures to other worlds. The government worked to 'clean up' various remaining relic traditions from the terraformation period it deemed 'disturbing', such as cannibalistic funerals. The quality of life of an average person on Corona during this period was generally excellent, if a bit dynamic and confusing.

However, in time, competition between corporations became fiercer and fiercer as they wage advertisement wars on the local population, further worsening the already shattered unity of the people on Corona. Fearing that the various factions on the planet would start turning against each other, sparking a war, the Nexus government started to tackle the problem by implementing strict legislation to combat the megacorps. The local businesses, ethnicities, and corporations also took a hit. They became increasingly critical of the rigid rulership of the Nexus and began to push for a merger with the NoCoZo. After several reformations, the government finally agreed. They planned to take the rest of the Nexus with it. The result was the First Consolidation War, in which the Iota system and several nearby systems it governed launched a warfleet into the rebelling systems and vice versa.

The battle, in 3396, was short and violent, as streams of rebel missiles and warships flew into the system. Corona, as the capital, was especially badly damaged, but the attacks struck its orbitals as well. New Geminorum, for example, only avoided complete destruction because its defense weapons managed to shoot down incoming missiles a little over 3 seconds before impact. Sonatan cities, however, completely avoided the assaults by maintaining low signatures and diverting attention away by hiding their few surface structures into the underground, leaving Sonata's surface as natural as possible.

In the aftermath of the war, Corona quietly joined the NoCoZo in 3435, bringing few inner Taurus Nexus worlds and systems with it. The United Corona Organization, a half-government-half-organization led by a group of transapient that would later become the Academy Minds, united the remaining cities full of panicking civilians. It was dedicated to preventing the planet from devolving into a bunch of warring states, providing resources for reconstruction of the damaged cities, and keeping the people of Corona happy and united. It intentionally left parts of several cities in (well-maintained) ruins as mementos of the civil war.

NoCoZo period

From the end of the First Consolidation War in 3435, Corona became a member of the NoCoZo. Many of the planet's transapients and modosophonts alike participated, and while not everybody was happy with the idea of joining the market environment, which often changes too rapidly for an average Corona person's comfort, most agreed to stay when the Hera Overseer announced that e is willing to exercise market power to keep the system prosperous and stable.
In 3467, the government began to promote the planet's cultures and massively backed the local corporations which began to make their way into the wider markets of the NoCoZo using the advantage given by the wormhole to Merrion (at the time one of the largest wormholes in the Iota system). Eventually, several of them, one-by-one, began to pay off, and over a century, Corona became more well-known across the NoCoZo. The planet gained some specialties during this period, including research and development, which quickly became its dominant industry. This would later develop further, eventually transitioning to a more well rounded academic culture that defined Corona in later eras.

In the same period, like many other NoCoZo worlds, Corona also began promoting itself as a planet with a long, eventful history, colorful cultures, many business opportunities, and welcoming people (the last of which isn't entirely true especially for Glara, although many other regions were willing to see more people coming in). Tourists, most of whom shied away from it after the announcement of the civil war, once again flowed back into the system. Various immigrants moved in and settled on this world, building more settlements, many of which were in the ocean. In 4155, Corona's administration division changed to the current system, with 2 land divisions and 3 oceanic divisions.
Corona's environs were extensively redeveloped during this period, especially during the early period, just after the civil war. Clouds of habitats were placed in various orbit, and in 4035, the first dynamic orbital ring was placed over the equator. Several beanstalks already around were connected to this ring, boosting immigration to this world further. Later, in 4384, a larger orbital ring would be placed to support the growing economy of the planet, but that would be the last one before the Version War.

Solar Dominion period

In 4492, during the Version War, a fleet from the Solar Dominion arrived at the system. The local defense fleets were unable to fight off the invasion. Quickly, Corona surrendered and was swiftly annexed by the Solar Dominion as with the rest of the system. While the planetary damage was limited, orbital defense infrastructures including defense swarms and whatever few military infrastructures were in place were cleanly eradicated along with the outer orbital ring (which at the time had military bases installed upon). The United Corona Organization, however, was left in place (after extensive reformation).

Under the Solar Dominion, new Solarism monasteries were built, people from Solarian worlds migrated to the planet, some trade opportunities arose, demand for sophont labor diminished in a few decades, and Corona's economy was reformed into an automated market economy with vot corporations competing with each other for sophont customers. All Coronese citizens were equal shareholders in these companies providing a cycle of wealth and a transition away from a labor driven economy that kept some of its market influence. This also allowed the academic side to flourish in areas that weren't commercially attractive. After a millennium of being a honorary capital where the Corona governing entity resided, Albertgrad finally was able to exert influence as a capital as well.

Some of the NoCoZo corporations managed to escape, at least partially, through the wormholes, the relics from the Taurus Nexus period, such as Rush Hour to Merrion, before the gates were shut down to prevent the Solar Dominion fleets from using them. Contact to those systems including Merrion remained through the comms wormholes in the system, and later it was confirmed that some of the companies that left for other stars survived.
Perhaps one of the regions most affected by the arrival of Solarism was Glara, which had been sort of a backwater prefecture plagued with immigrant problems. While the differences between various groups of immigrants, refugees, and 'locals' had mostly melted away, in place a unified Glaran culture, resent towards the 'Coronese' lingered. From 4510 to 4530, several radical movements arose from Glara, but perhaps the most successful was known as 'Better Here', founded in 4528. The movement advocated the Glarans to reject all Coronese cultures and embrace individualism. Glaran culture would fracture into many shards which would then continue to develop separately from the rest of the Corona, even after the independence in 4606.

Corona would stay in roughly this state for much of the rest of the occupation until a wormhole from Fons Luminis arrived in 4597, when a Solar Dominion linelayer directly from Fons Luminis arrived at the system. This presented new opportunities as well as challenges to the people of Corona. Influences from Solarism were already noticeable among the population, but the effects exacerbated when the wormhole arrive. Finally, the entire Iota system, spearheaded by none other than Corona itself, 'revolted' against the Solarian rule in 4606, 50 Coronese years after the annexation. The revolt went surprisingly well, and the Solar Dominion granted the system independence, leading to some wondering just how important the Iota system was to the Solar Dominion. The wormhole was left opened, however, as the consensus deemed it useful in the future.

Academic Rising Period

After the Solar Dominion occupation various colleges and universities banded together into an organisation known as the academic union. Pooling their resources and capitalising on the local cultural drive for research (and the lucrative data-flows through the system wormholes) they founded "University city", later to become the 'academic' second capital, located just off the western Quark shore. At first, it was a rather small, quiet settlement, a haven for academicians of sort, but it would quickly grow bigger and more influentual. University city began to promote the academic culture, which had already been taking roots in various polities. This proved successful. New academies were founded, most joining the Academic Union and some operating independently. The concept of 'research tribes' formed during this period, and has since then became a major institution in the Coronese society. Many academic competitions were held, including the first of the famous annual competition event Breakthrough Again, in which participants remove their modern knowledge, replacing it with knowledge of an academician from earlier periods, then attempt to be the first to prove famous theories from those times.

On the less academic side of things, it also became popular and fashionable to take the form of and act as famous scientists and researchers from various periods of time. For example, it was not hard to find recreations of Einstein and Sagan chatting with Archimedes and Alemseged, especially in the Corona Academy virch.

In the star system starting from 4609, three years after Iota system's independence, an S4 entity which called emself the Iota Scholar, a result of the mergers of many S2s and S3s in a group which migrated away from the Iota system prior to the Solar Dominion occupation, contacted the Iota system through some of the old, pre-Version War comms wormholes. E offered to declare the entire Iota system er protectorate in exchange for er protection and technologies. Most Iotan polities, except few polities like the Minerva Confederation (at first), the Turye Ring, or the Blissful State of Nirvana, all agreed.

ComEmp host period

Corona temporarily became the Commonwealth of Empires' neutral seat from 4830 to 4870. As one of the victims of the Version War, the ComEmp was indeed a welcoming development. When the news arrived at the planet, it celebrated enthusiastically.

Becoming the seat of the ComEmp brings many benefits. Aside from promoting the planet and boosting its credit massively, people from all across the Terragen sphere also flowed to the planet, and with the various businesses and development projects, results in a great increase in its capabilities and the people's quality of life. Among those many development projects was the construction of the Hydersbaad Consensus, an academic-cultural orbital habitat built in Corona orbit to accommodate the influx of diplomats, researchers, and memeticists. The outer dynamic orbital ring was reconstructed during this period and the inner one upgraded to match. Both were open for habitation, and people from many clades moved into the ring, some eventually becoming permanent citizen, colloquially known as the Ringwalkers. Corona's first Hohmann regattas were also launched during this period, towards all major planets in the system.

The other planets in the Iota system also get some benefit from this event. Both Hera and Hestia both used this opportunity to launch themselves into the galactic market, several smaller polities based on dwarf planets and the debris disk took advantage of their boosted income to develop their worlds, and Eva even managed to export its cultures to several worlds in other systems. Iota-Corona Lagrangian point 4, best known for containing the dwarf planet New Eureka, the autonomous province of Corona, saw massive population boost, the effects of which still linger in the current era. Its shipyards, lead by the Archimedes shipyard, were upgraded to support activity growth at Corona.

When the ComEmp moved out of Corona, it once again slowly returned to obscurity in the galactic stage. However, although brief, this event left a permanent mark on the planet's people. The day the news arrived at the planet was made the national holiday, and is widely celebrated, especially at Alemseged. Many of the infrastructures constructed during this period are still in use even to this day.

Dynamic Worlds period

Virchworlds had been an indispensable part of Coronese society. As a form of social media, they link the planet together and allow people from the other side of the world to share information and do activities together. Thus, in 5234, the Academy Minds manager of the outer orbital ring decided to refit the many databases on the ring, formerly lightly populated and mainly for academic and defense purposes, into habitation virchworlds, and invited people from the surface to join those new virchworlds. Among many other standard features, e allowed the virchworlds to split and merge easily and freely.
Starting from 5300, people began to flow into the outer ring, joining the many virchworlds. Many of those virchworlds were used as meeting spots for people with the same interests, and were shaped accordingly. The number of population in these virches range from a few dozens to millions. Many popular virchworlds may had accumulate several dozen million sophonts in their virchworlds. Many of the virches eventually split and merge as people's interests shift, creating a dynamic space. The number of virtual population spiked sharply and fluctuated wildly during this period as well.
With close transapient supervision, conflicts between virchworlds remained low. By 5600, there was a gradual decline of 'immigrants' to fuel the dynamic worlds in the outer ring, and after 5900, the phenomenon faded away, leaving the outer rings with a population hundreds of times of the number before this period and a culture that gladly embraces changes, discoveries, and partings.
Other important events which happened during this period include the construction of the Coronese Historical Telescope Array at the outer edge of the system in 5401, which would become yet another popular tourist destination in the Iota system.

Corona Aurora
Image from Steve Bowers
The natural aurora of Corona is formed by the magnetic field of this world, which periodically undergoes a reversal of polarity

Magnetic reversal period

Starting from the early 5500s, Corona's magnetic field started to weaken and its magnetic north started to accelerate away from its original location. Already anticipated, researchers concluded that the planet's polar reversal was about to happen soon. The general public had mixed reactions, most were enthusiastic about the possible planetwide auroras, and some, mostly baseline humans, were afraid of the possible stellar storms. Cities began to make the preparation they deemed needed, but in the end, most but few retro-style cities (such as Aichi's town sector) concluded that their existing equipment can handle the event. In 5543, the Iota Scholar announced that e was about to assemble a system to control the star to prevent possible catastrophic flare events just in case. In a span of a decade, several reactionless drives moved resources from other stars and assembled orbital infrastructures around the star.

Finally, in 5900, the long-anticipated magnetic reversal started. The magnetic lines collapsed into an entangled mess, and dim auroras appeared everywhere on the planet. True to er promise, the 300-year period of Corona's magnetic field reversal was free of strong stellar flares, and the magnetic field settled in 6200 without an incident.

This planetwide aurora event inspired many artists, leading to a short musical renaissance event, the Ylkalo Revival, which saw a rise in popularity of acoustic music performed by lightly-augmented bioids. One of the instruments that became popular during this period was the Resona, which is one of the few instruments from this period that is still popular in the current era.
In another topic, the various polities under the United Corona Organization, after millennia of working together, had lost their reason to stay independent, and by this period had voted to merge and form the current government, the Planetary State of Corona. The official founding of the Planetary State of Corona was in 6035, celebrating 2,000 local years of the founding of the Coronese civilization.

The Thousand Year static period

Over the next thousand years, Corona and its environs fell into slumber. Some of the population moved out of the planet, outwards to many rapidly growing communities on dwarf planets, especially New Eureka, and the various new Bishop rings springing up around Hestia. Among the popular interstellar destinations was New Maria, which had also started to promote itself as an alternative destination for people bored with life in the Iota system, especially for their exotic retinaldehyde plant ecosystems. Most of the people remaining on the planet settled in rather static states. The static period did not necessarily mean the quality of life of the people on the planet was worse off, however, but rather more of a period where less 'exciting' things happen. Examples of things happened during this period were such as the development of the contribution factor economic philosophy.

While the rest of the planet experienced a static period, in Glara, things were changing quickly as new types of experimental societies arose as the subcontinent's population began to form groups based on their interests. Some of the successful examples were such as Memphis, which had developed incredibly diverse yet united cultures, and Kaifeng, adhering to the principle of happiness-based society. Others developed interesting and exotic societies, such as Navoose, a tethered sky city built during this period especially for a clade of floater tweaks with a strong politeness culture, or Soljeva, a city in a bottle-shaped arcology inhabited by sarcastic sentient gelbots.

In Corona's environs, living in the Chandelier cities became popular, and several large, bright habitats were constructed and hung down from the inner orbital ring. This, combined with the already-dimly glowing orbital rings, creating bracelets of light when viewed from the surface. Some of these habitats are still in use in the current era. Some of those cities had been influenced by the Better Here movement and also developed their own culture, but none as exciting as the original ones.

Corona renaissance period

Towards the end of the stagnation period, immigration increased, including people returnees. Those people brought along with them cultures from other worlds. The new change caused many to express their concern that the Coronese cultures would soon vanish, and thus several new movements arose decades before 7200, before merging into the planet's largest renaissance event yet.
Old cultures were revived, and in several cases mixed with new ones. Cultural elements from Republic and Taurus Nexus period cultures and values reappeared. Pioneer appreciation festivals were often held on Quark, especially at Heisenberg. Religiously, the harmony of all faiths was promoted. It was (and still is) common to see Baryonese Solarist, Neo-Buddhism, and Etodist monasteries stood side-by-side on Gzeut, or Universalist and Almighty Dollah churches at NeoAtlantia. It was also yet another time the academic institutions and industries on the planet bloomed as new academic institutes spring up and forth, and some of the Academy Minds celebrated the occasion by installing the famous 'aurora ring', transparent panels displaying colorful aurora texture which can be seen from almost everywhere on the planet, hanging down from the outer ring. The aurora ring received positive responses from both the citizen and visitors.
The Corona renaissance period was also the time of reevaluation. After the thousand years static period, Glara became more open to the rest of the planet. When the renaissance period begins, one by one Glaran cities rejoined the wider Corona, and finally the last territories joined in 7323. The peaceful unification was celebrated by the development of a coastal city of Eureka into a massive megapolis. It was then made the capital of Glara in 7327. Most of the unique cultures, however, were preserved and some, such as the happiness-based society, were even integrated into the larger Coronese cultures.
By the end of the period, the Coronese civilization can be said to be a mix of academic and cultural elements, with diverse cultures from just about every single period of Coronese history prior to 7500 mashed together with outside influences, either from neighboring planets (such as strong dynamic NoCoZo-style cultures from Hestia) and those beyond the system's many wormhole links, physical or comms.

New Expansion period

During a brief 100-years long period between 9200 and 9300, the Iota Scholar gifted the Iota sector systems with several colony ships, which were then launched through the already-existing stargate Letter to Outpost Nowhere, a wormhole connection between Iota and Ais Alnah, a hub star system in the Iota-controlled Blackbody cluster some 3,000 light years away, and onwards to various destination wormholes at the edge of the Nexus, before heading on to their directions.

During the period, many Coronese, mainly nearbaselines and provolves, joined the colonization effort. The rest of the planet, however, was mostly indifferent about the idea. Some people at the time believed that the Iota Scholar planned to ascend to S5 and the colonies will soon be integrated into er wormhole links, but the fact that the colony ships merely 'seeded' the worlds, and did not develop those systems extensively, left the reason for this colonization effort unclear.

Sonata and Corona
Sonata, the single natural moon of Corona


Politically, Corona is in a unique spot. At first glance, the Iota system, where Corona belong, is seemingly a normal stargate hub system with links to several nearby systems, but it and those systems are ruled over by an S4 archailect. Although technically an independent system and thus not in the Sephirotics, the entire Iota system is aligned with it, has many close ties to many of the Inner Sphere and Sephirotic systems and is usually treated as one.
In the Iota system, the current era Corona is a culturally and academically strong but politically weak planet, overshadowed by its much more populous neighbors, Hera and Hestia. Likely due to the Taurus Nexus civil war, the planet often has the mentality to prefer to not get involved in interplanetary political affairs and especially not the interstellar ones. This policy is in many ways similar to the Minerva Confederation's, and in contrast to Eva's attempts to assert itself as an important political entity in the system. It has few off-world claims, the major one being New Eureka.

Corona and its environs are controlled by the Planetary State of Corona. Its surface is divided into 5 divisions: Baryon, Quark, Planck, Fermi, and Bose, while its environs are also divided into 2 volumes: cis-Sonata volume and Sonata (autonomous). The polity also controls Iota-Corona L4 (containing New Eureka and its moon Archimedes) and Iota-Corona L5 (all asteroids converted into a single Bishop ring). The polity is overseen by the Academy Minds, who is in turn supervised by the Iota Scholar. Each member of the 256 Academy Minds has eir own ethos.


In the Current Era, Corona's societies all practice minor variants on post-scarcity of the commons whereby all land and infrastructure is collectively owned and administered cyberdemocratically. However, most of the societies on/around the planet employ a contribution factor-mediated basic income system. These societies have many sophisticated metrics evaluating everyone's academic contributions. The higher one is evaluated, the more funds they are allocated, making them personally wealthier and also allowing them to finance more sophisticated studies and larger researcher teams. Sonatans also employ similar systems, but often for rewarding artists, especially audio artists, instead of researchers.


The society of Corona is divided into many kinds of social groups. Firstly, physically a person may identify themselves as a member of the city or settlement they currently reside in. This is similar to nation states, but easier to change. Some cities have their own version of laws, although most of those don't differ much from the standard Coronese law.

In academic fields, 'research groups' connected by virchworlds such as the Corona Academy formed. Each research group have their own goals, which may be about a single subject or several, specific or broad. The most famous example is perhaps the Godslist group, with membership, which focuses on researching transapients and archailects. Since the concept's introduction during the academic rising period, it has spread beyond Corona, throughout the Terragen sphere.

Finally, 'clubs' are created to gather people with interest in the same kinds of recreational activities. While most clubs are small and may contain hundreds to tens of thousands of people, some of them are truly massive. The Festival Research and Expression of Self club of Alemseged is by far the largest of these, with much of the population of Alemseged and even more from the rest of Corona plus its environs as members, totaling almost a hundred million.


In the current era, the Coronese civilization can often be defined by its strong academic elements, but its cultures are diverse, and constantly evolving, thanks to information transfer and migration from other systems, especially ones with direct physical wormhole connection such as Merrion, Fons Luminis, and Nova Terra. However, there are some central elements that virtually all present-day cultures on Corona share.

Academic Culture

While Corona is not the oldest known Terragen academic world, it is the oldest continuously active one. The academic institutions of Corona are some of the most venerable in the Sephirotics. Despite periods of decadence, decline, and irrelevance, the colleges have always recovered, and are currently important centers of independent scholarship, especially in the fields of sophontology, toposophology, archailectology, and godwatching.

Since its popularization during the academic rising period almost 6,000 years ago, the academic culture has always been an important part of the planet's metapsychology. Over 95% of the population has superior enhancements, in one way or another, and over 60% states that they strongly value knowledge. This culture's influence is so strong that the societies of this planet reorganized over millennia, academies growing massively in importance and eventually becoming part of most Coronese people's daily life.

The proof of this strong academic culture can be observed even far beyond the Iota system. In the current era, there are billions of outposts affiliated with the academies of Corona across the Sephirotics, especially at population centers and archailect brains. As the result, yobibytes of data about various emerging cultures, transapients and archailect activities, and all sort of other information from tens of millions of star systems throughout the Terragen sphere constantly flow into the system, and stored in various Corona-owned databanks around stars in the Iota Network, such as the two Minerva L4/5 computronium nodes.

Several cities and settlements on Corona devote themselves to certain subjects, such as Neo Atlantia, after almost nine millennia of influence from Godslist, is perhaps the most prominent example, being specialized in transapient sciences, archailectology, and godwatching, while other cities are more balanced, like Heisenberg and Ruki. However, there are also many cities where the academic culture is less influential, such as Alemseged, where people can take breaks from the academic air and celebrate various kinds of festivals from all over the Terragen sphere.


The official language of Corona is Academic Coronese, a systemic, complex constructed language meant to facilitate the conveyance of complex ideas and their relationships, and designed for ease of categorization, comparison, and citation as well. The other Coronese 'dialects' which developed out of this Academic language are largely the same, except pronunciation.
Corona and its artificial rings
The space between the orbital rings is capable of displaying an artificial aurora, as well as a range of other displays

Sky Visual Arts

Auroras and related sky phenomena are among the Coronese civilization's most famous symbols. As such, numerous methods were developed to either replicate, perfect, or act as substitutes for the natural auroras, which are not always available. Apart from the aurora ring, many popular methods in use on Corona are firesculpting, ion fireworks, ionizer fireworks, gas seeds, and artificial color meteors. Each of them has its own details, advantages, and risks.
Firesculpting is the most specular, but expectably it is also the most risky method. Firesculpting begins by first triggering a large solar flare or coronal mass ejection in a local star and then using magnetic field generators and other devices to manipulate a planetary magnetic field to control and shape the auroral displays that are created when the charged particles from the star impact the field some hours or days later. Using powerful magmatter based field generators operating in close planetary orbit or even tunnelling through the planetary core it is possible for a skilled artist to not only produce especially energetic versions of a planetary auroral display but to actually shape fairly complex and concrete shapes in the plasma cloud. Several of the Academy Minds are skilled firesculptors, as well as many S1s.

Ion fireworks and ionizer fireworks are more widely used. Ionizer fireworks work by injecting in energy to ionize the atmosphere, creating colors depending on the location the firework blasts. Ion fireworks, on the other hand, work by directly injecting ions into the higher atmosphere/space. There are two types: solar wind fireworks and excited ion fireworks, the former dumping protons and electrons to interact with the various atmosphere gases, and the latter directly creating colorful auroras not limited to the colors that can be created by the gases in the atmosphere. For example, a large scale usage of excited ion fireworks containing sodium compounds and calcium compounds are used to create the famous 'golden crown' for the planet.
Gas seeds are often used as an alternative to ion fireworks. It works by simply releasing gas into the high atmosphere, then let the solar wind ionize said gas. It is sometimes used in conjunction with firesculpting.
Artificial meteors are perhaps one of the safest, but also the least spectacular of the available methods. Before the event, designated High Cyclers drop cans of smart pebbles in a highly eccentric orbit, timed so they would be in the correct location at the time of the festival. When the time arrives, they deorbit and scatter the contents which burn like meteors in the atmosphere. The payloads are usually simply chunks of metals which gives of various colors when burned.

There are many colleges on Corona which offer classes on various methods of sky visual arts, and a few colleges are even dedicated to those subjects. Various schools often debate vehemently about how to create effects that are aesthetically pleasing when seen from both the planetary surface and from orbit.

Corona- labelled
Image from The Astronomer
Corona map: Geological features + Settlements

Notable Locations

Accumulating history for over 9,000 years, Corona and its environs have many notable locations. Most of those locations functions as tourist attracts as well.

Capital cities

Duorkin [1486-1547] - The first capital of Corona, it is an ancient, venerable orbital in stationary orbit around Corona. Originally a spacecraft, the Ruth Duorkin, which towed an asteroid along, it grew over time as more and more modules were attached and integrated. In the current era, it is a complex of some 24 rotating habitats, each roughly 15 kilometers long and 5 kilometers in radius. The original spacecraft is now stored in the heart of the habitat, inside the asteroid which has been converted into a museum.

Heisenberg (founded 1476) [1547-1829] - The second capital of Corona and the first one on the surface, Heisenberg, located at the northernmost Feynmann bay shore. Today, it is the capital of the Quark province. It consists of three main districts: the surface arcology district, each some 1-3 kilometers tall giant towers covered in evershifting frescoes of famous people and great moments, the treehouse forest district, a dense forest of many species of genetically engineered trees which grow habitation spaces and all the amenities, and the oceanic habitation complex district, sitting at the end of the densely populated piers, towering above and below the sea level and home of various types of both terrestrial and marine sophonts.

Delphi (founded 1794) [1829-3396] - The third capital of Corona during the Republic period and the Taurus Nexus period located in southwestern Quark. Once a peaceful and prosperous city, it was crippled by the rebel attacks during the civil war. Since then, the survivors were evacuated, and the city ruins itself has been continuously actively maintained since the end of the civil war to remain in roughly the same condition. Today it is an archaeological site where researchers and tourists come and go, and a small population lives in a new ring-shaped city surrounding the ruins. It has a small vactrain station sitting between Neo Atlantia and Cheever.
New Geminorum (founded 2448) [2450-3396] - During the Taurus Nexus period for Corona, the Taurus Nexus government relocated itself to this 25 kilometers radius Stanford Torus built in advance at Corona-Sonata L4, at the time the largest orbital habitat around Corona. The interior is green and urbanized, with most rooftops made into pools, parks, and fields. In the Taurus Nexus period, it was infamously known for its bad city planning. Navigation was often confusing to unaugmented baseline human due to the sheer complexity of the place, with several dozen floors of interconnected buildings. The reconstruction of the habitat after the civil war reworked the city plan and cleaned the chaotic connections up, replacing with neat bridges, at the minor cost of travel time efficiency for augmented people who do not have problems with the complexity of the habitat. In the current era, New Geminorum is completely angelnetted.

Albertgrad (founded 1478) [3396-] - The current capital of Corona, the result of the United Corona Organization's relocation of the capital in the aftermath of the civil war. It is a well-balanced scientific-cultural city built next to a river delta on eastern Gzeut shore. The city has an orderly cobweb plan with two centers, with brightly lit suburban settlements along the vactrain connections radiating outwards to various nearby settlements, while links between each line are kept dark. While in normal times the city itself is unremarkable compared to the other major cities in this world, once a year it becomes the place where the people of Corona gather, either in the real world or virtually, to celebrate the founding of the Coronese civilization. During the celebration, at the night time, ionizer fireworks, gas seeds, and artificial color meteors are often used.

University (founded 2123) [4728-] - The academic capital of Corona, as well as of the Iota Commonwealth, the University city is a gigantic union of hundreds of major academies from during the Republic period over 10 kilometers in radius. The city itself consists of many floating arcologies, surface, and underwater, linked together orderly. The very center of the city is a single 5 km tall 4-sided base pyramid-shaped arcology built since the founding of the city. The outer core is consisted of 16 pillar-shaped arcologies surrounding the central pyramid, linked together by rings of sky vactrain lines. The city is surrounded by many platforms, most of them dedicated to tourism. It has a large underwater computronium bank which houses some of the Academy Minds who were residents of this city.
Mincity (founded 5409) [5763-] - The virtual capital of Corona, and a famous Minimal Surface City, originally founded by Kalmanto Aesthetics in 5409 as a rebellion against the old-fashioned building codes, an AI entropy tax haven, and an artwork. The city, covering a few square kilometers of southern Casamalunna, is home to a large number of AI luminaries and virtualities. The periodic redesigns draw a large spectator crowd.

Regional capital cities

- Heisenberg [1792-]
- Freemanberg [1806-3396]
- Celsiusen [3398-]
East Baryon/Gzeut:
- Albertgrad [1784-]
West Baryon/Glara:
- Aktera [1811-7327]
- Eureka [7327-]
- University [4155-4832]
- Aichi [4832-4875]
- University [4875-5763]
- Mincity [5763-]
- Omiata [4155-]
- Agrawal [4155-]

High Cyclers
The orbits of the High Cyclers around Corona approach the planet closely, and have periapses lower than the innermost orbital ring

Notable locations

Neo Atlantia (founded 1845) - Neo Atlantia is a large busy floating academic city consisted of over 5,000 platforms linked together and divided into zones. It is well known for the famous Atlantean skyships (which later spread to many other cities) and the Institute of the Godslist Database. Currently, the city is roughly 5 kilometers in radius. The very core of the city is the eleven platforms holding the official Institute of the Godslist Database. In the outer core are multitudes of buildings, some dedicated to the Godslist, some dedicated to the Godslist's employees, and a multitude of service buildings catering to employees and tourists alike. The western rim of the city is dominated by the low, spacious houses of the locals, and the eastern rim of the city seems more or less like a single organic mass divided only by the canals, the platforms here being the largest of the city.

Celsiusen (founded 2236) - Most well known for its gigantic fog nets, biological and artificial, and Roman-inspired architectures, Celsiusen is a city located in the Lambda Baryon desert. The zones in the city extended away from the center north-south and east-west, creating the well-known star glare cross shape that became the city's symbol. Fog nets are placed beyond those areas, west of the city, receiving moist wind from the bay to the west. Water collected from those nets are used to green the surrounding area, while the city lives of fresh water directly obtained by desalination of seawater, and in the current era, it has turned into a lush oasis in the middle of the desert. Apart from the architectures and the fog nets, the extreme music band of Flaming Baryons also attract quite a few people to this city.

The High Cyclers (founded 2507) - A group of 24 habitats orbiting around Corona in a highly eccentric synchronous orbit. Each habitat's size at the longest axis ranges from 5 kilometers over 25 kilometers, and can be any kind of orbital within the size limit, may it be an O'Neill cylinder, a habitat built inside an asteroid, or a Dyson tree. A pair of cyclers shares an orbit, traveling together. There are two groups of cyclers: the prograde cyclers and the retrograde cyclers, each having 12 habitats in 6 orbits, each 60 degrees apart. Each group is misaligned by 30 degrees from the other, resulting in a high cycler orbit having two neighbors orbiting in the opposite direction 30 degrees away, both west and east.
The Aurora Towers (first member constructed in 3255) - The Aurora Towers is a group of actively supported space towers located near the poles, within the aurora ovals, reaching to the altitude of anywhere between few tens to almost a hundred kilometers. The first tower was erected in 3255 on Hadron by an S1 transapient who declined to state the actual purposes of those towers. Several more towers were erected during that century by other transapients. The popular name 'Aurora Tower' came from a popular hypothesis that the towers are constructed for viewing the auroras. While there is no proof, in the current era they are used as such.

Aichi (founded 3571) - Unlike its bustling sibling city, the University city, Aichi is a small, static, quiet town located on a small island north of Gzeut. It is modeled after an average information age suburban Japanese town (although with many elements from other locations, especially interplanetary age suburban Asian cities), with some districts combining it with native Coronese architectures. It briefly became the capital of the Planck province from 4832 to 4875. The town is known for hosting a disproportionately large fraction of the planet's miscellaneous databases under it, earning it a nickname 'Library town'. Its many hot springs, both inside the city and surrounding it, are powered by the coolants of said databases. It is managed by an S1, who sometimes place hidden features and strange artifacts across the town.

Alemseged (founded 4546) - Alemseged was built as a Solarist holy city on Corona by digging into an inactive mountain range. Even after the planet's independence, it remains a strongly Solarist city, although it has taken a rather unique path. The city is home to a very diverse population, with membership consisting of almost all clades which can be found on Corona. The city is built vertically, consisted of hundreds of giant towering rod-shaped arcologies called pillars. Many lights were attached to the ceiling during the city's founding days, and are responsible for the city's 'starry sky'. The city is also densely angelnetted, allowing the residents to fly between each pillar to the next. The city gave rise to many artists, especially poets. In the current era, the city is most well known for frequently holding various famous (and more less well-known) festivals from other worlds all across the Terragen sphere, in the real world, in augmented reality, as well as in their virchworlds. The festivals are not as much of a faithful replication as it is to allow its inhabitants to 'express' themselves freely, but realistic replications are available.

Hydersbaad Consensus (founded 4832) - Academic-cultural orbital habitat in Corona orbit. Built to accommodate the ComEmp influx of diplomats, researchers and memeticists, it was at the time one of the most modern socio-academic research environments. Over time it has largely lost its importance in research to groundside institutes, and is currently a living museum of ongoing but fairly static philosophical and artistic endeavours.
Heritage Range (constructed 4874-5185) - Beginning in 4874, the Superior artist Lebodon Banx set about carving the likenesses of the great scientific minds of terragens history (up to that point) into the face of the mountain range which rises sharply out of the lowlands around Feynman Bay on Corona. Working alone and with minimal robotic assistance, it took Banx some three hundred years to complete eir great work. Beginning with such notable ancient figures as Archimedes and Galileo and continuing on through various faces both famous (Einstein, Hawking, Duorkin) and almost unknown (Enduring Blue of the Summer Light), Banx's masterpiece gained em instant celebrity status and many followers. In the modern era, the Heritage Range is seen as a proud symbol of Coronian scientific prowess and history. Most tourists to the Iota system make it a point to visit the range and it is a favorite backdrop for concerts, sporting events, and similar occasions. In 5310, a microlayer of nanodiamond was laid down over each face and stabilizing carbon nanoweave was injected into the mountain's underlying substructure to protect it against the ravages of time in the form of weather and geologic shift.

Kayla's Pier (founded 7204) - An artificial peninsular city designed by Henna Artool Kayla in 7204 AT and constructed later that year. Fashioned as a super-long pier the city consists of the main boulevard flanked by residential, industrial and leisure zones. Initially, it extended northward, over the following centuries it was iteratively expanded until it spanned to the isles of Eze-Oni, the northernmost landmass on Corona excluding polar ice caps. The point at which the city meets the shoreline is well suited for viewing the aurora. This coastal region hosts a large circular plaza some 4 kilometers across that acts as a public viewing spot for the aurora as well as a landing zone for the aurora-chasers during the vernal equinox.

The Lovelaces (founded 7218) - A fleet of seagoing mobile cities sailing in the Einstein sea, visiting coastal and oceanic cities in the route. Floating cities, submarine cities, and sky cities capable of moving itself fast enough under its own power are free to join and leave, but there is always the core of the fleet, led by the Alan Turing. The fleet serves as a connection between many cities in its path, carrying cargoes and ferrying tourists wishing to enjoy the slow sightseeing trip on various cities across the Einstein sea. It is often accompanied by a large number of non-habitat vehicles, may it be ships, skyships, or submarines.

Notable virchworlds

The Corona Academy (founded 2350) - Originally simply called the Corona Virchworld, a union between seven major cities' public virchworlds, the Corona Academy virchworld is perhaps the largest and the most populous virchworld of all time on Corona, essentially a gigantic global social media platform intended to be the place where people from around the planet can meet, learn, and share their information. In the current version, upon entrance, the vuser is placed several virtual kilometers away from, and facing, a 1:1 replica of the University city with a giant glowing Radiant Crown above it. The virchworld offers all sort of environments (within boundary) in subworlds within, not just the academic atmosphere, as well as sophisticated customization tools and supervising moderator hyperturings.

One feature which became famous is the avatar that greets and guides the vusers upon their arrival in the virchworld, a feature first introduced in 4632 to celebrate the 1,000 Coronese years anniversary of the founding of the virchworld. In the default state, the avatar takes the form of a member of the viewer's clade in the current period's academician 'uniform'. The original official name for this character was simply 'the Academician', but the user-created alternative name 'Corona the Academician' was popularized, and eventually turning into its new official name. The avatar is sometimes used as the planet's mascot.

Yohome (founded 4808) - A network of virchworlds located inside a seemingly normal 12-kilometer radius asteroid whose interior has been converted into computronium, Yohome is the largest alife habitat/zoo around Corona, boasting some 5,000 alife habitats and a zoo. All species are reportedly subsophont, and modosophonts and transapient investigators alike so far haven't discovered any sophont right abuse, or at least declined to announce. According to several sources, it was owned by one of the colleges, now long gone, likely a member of the Academic Union.

The Alternate Corona Scenarios (founded 5567) - A group of virchworlds created during the dynamic worlds period. It is located in the outer orbital ring's databases. It was created by the Society for Study of Alternate Corona, the research group which bought copies of high accuracy data of Corona before terraformation from the Great Library of Aichi and used them to recreate the planet before it was modified by the Terragens. Most of those alternate Corona were then enviroformed into various types (such as terraformation but without geosculpting, a To'ul'h-like world, or partial-computronium), but some were left alone. Some of those later evolved into museums or open for colonization and tourism.
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Development Notes
Text by From an original article by Anders Sandberg... Updated 2019 by The Astronomer
additional material by Steve Bowers and John M. Dollan
Initially published on 12 August 2000.

Additional Information
Celestia add-on for this system
Iota Piscium (best uploaded to a new instance of Celestia, one which does not include the older OA addons)

Unzip this folder into your extras file in Celestia. To visit Corona, use this CEL link