Mechyrdia (planet)

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As seen from orbit
Location within the Empire
Planetary information
Mean radius 1 Rμ, 6,144 km
Mass 1 Mμ, 6.4e+24 kg
Surface gravity 11.32 m/s2
Axial tilt 12.8 degrees
Semi-major axis 1.77e+8 km
Orbital period 256 Mechyrdian days
(99.42% the duration of one Earth year)
Atmospheric pressure 82.78 atm, 8.39e+6 Pa (surface)
1.29 atm, 1.31e+5 Pa (subterranean habitation)
Atmospheric composition 64% carbon dioxide, 27% carbon monoxide, 5% nitrogen dioxide, 3% nitrogen gas, 1% sulfur dioxide (surface)
84% nitrogen, 12% oxygen, 3% argon, 1% carbon dioxide (subterranean habitation)
Stellar information
Star name Mechyrd
Star mass 3.2e+30 kg
Star volume 1.44e+18 km3
Star luminosity 3.6e+26 W
Star age 4.2 Gyr
Population, government, and economy information
Population 25.6 billion
Ethnic groups 76.8% Human
4.7% Tylan
16.1% Abhuman (gene-modded)
2.4% Other
Governor Śtasimó Adlerić Varranów
Classification Industrial/Ecumenopolis
Industry focus Power Generation, Information and Computation
Pollution level Highest in the galaxy

Mechyrdia is the capital world of the Empire of Mechyrdia, and the homeworld of humanity. It is a heavily polluted urban/industrial world to the point that the Mechyrdian humans have gene-modded themselves to be resistant to toxins and pollution.

As the capital world, Mechyrdia is home to the Imperial Legislature, the Imperial Chancellery, and the Imperial Palace.

Human History

Before the Circumdrive

Before the circumdrive, humanity inhabited the planet Earth, within the Sol system. Mankind's technology was advancing at an exponential rate. After a hiatus on human space travel, by 365 PC (2018 AD) a primitive automobile was launched into orbit around the home star. This automobile would later be towed and put in an orbital Earth museum of early human space travel.

The Early Space Age

In 314 PC (2069 AD), humanity invented the circumspace drive, allowing them to travel interstellar distances and colonize other worlds. Humans colonized many worlds, one among them Mechyrdia, in 299 PC (2084). Mechyrdia was not a normal colony, however; it was an experiment by various engineering enthusiasts to create a technological culture and language. The Mechyrdian humans were seen as unusual outcasts by the humans of other worlds, and yet their technology was widely sought after. Their advanced technology led to the invasion of Mechyrdia by the Space Force of the United States of America, which sought to take the Mechyrdians' technology for themselves. The US was eventually driven off, due to the local colonists' guerilla tactics.

During this time, the various human countries formed good diplomatic relations with the Tylan Theocracy. Some other colonies, such as the Italians of New Fiume, voluntarily became subjects of the Tylans.

The Dark Age

In 135 PC (2247 AD), an authoritarian state of several alien races, known as the Drakhassi Federation, came to humanity and enslaved the populace, treating humans as state property, forcing them to work for nothing in return, and executing any who resisted. The Tylan Theocracy to the east, due to its radical anti-slavery policies, declared war against the Drakhassi. This war was known to the humans as the Sitzkrieg, a pun on Blitzkrieg (an ancient tactic from the Age of Earth), as the Tylans didn't execute any offensive actions against the Drakhassi.

After mere months, the humans would rise up in revolution and seize one of the federation's planet-breakers. They went from world to world, evacuating the humans, pillaging the technology and resources, and then destroying the planet. Having formed a revolutionary republic in 64 PC (2318 AD), the humans focused themselves on the eradication of tyranny. The human republic would not last, however, as an ambitious general Nikolaeus Burgaund would execute a coup d'état and declare himself king.

As the king, Nikolaeus declared his ambition to wipe out the Drakhassi natives. However, by this time, a malicious god known as Aedon had become fully awoken due to the destruction of the Drakhassi and the federation that they had formed to contain the Aedon Vortex. Such reawakening alarmed the Tylans, spurring them into action; they conquered the human revolutionaries, and forcefully made the humans subjects of the Theocracy. As a psionic race, the Tylans had always understood the threat that Aedon posed to the galaxy.

The Tylan Era and the Twin Revolutions

The human realms chafed under the bonds of the Tylan Theocracy. While the Theocracy remained a free, if somewhat corrupt, representative democracy, it didn't allow humans to vote, as they inhabited subject realms, outside of the Theocracy's core territory. Furthermore, the Theocratic government had imposed harsh taxes upon the human realms to fund repairs of the damage caused by the war with the Drakhassi. Eventually, the Kingdom of Mechyrdia declared independence from the Tylans, leading many other human feudatories to join with the Kingdom. This led to the founding of the Empire of Mechyrdia in year 0, beginning the first of the Twin Revolutions.

Meanwhile, the Theocracy was facing its own internal struggles. The Tylan populace had likewise become tired of Theocratic corruption, and thus a revolution was started by a Tylan militia known as the Forest Brothers; hence the name of the Twin Revolutions. This revolution led to the formation of the Tylan Republic, which joined the Empire of Mechyrdia, creating the dual-state system that the Mechyrdians have today.

The Empire of Mechyrdia

See: Mechyrdia#History


The Mechyrdian capital world is an ecumenopolitan ocean world. In early human history, much of Mechyrdia was frozen ice desert or tundra, with a small band of temperate climate around the equator. Now, pollution from millennia of industry has melted the ice and turned the planet into a massive, continuous ocean. This was of little consequence to the human civilization, as they had already build their cities underground for better access to geothermal heat.

The vast Mechyrdian ocean can dissolve plastic; not because the plastic is biodegradable, but instead because the ocean is so full of industrial waste chemicals that it can dissolve essentially anything. Mechyrdian ocean-water is toxic even on contact with skin; it dissolves even bone within seconds.

There is no macroscopic marine life in the ocean, having been either hunted to extinction or killed by pollution. The only animal or plant life on Mechyrdia is either domestic or agricultural, existing within homes or small underground farms.

The planet has a total of 49,152 public shielded passageways from the high atmosphere to underground starship docking hubs; many more exist too, however they're for government or military use only, and their locations are not publicly accessible knowledge.

In the year 172 OC, it was determined though extensive surveys that Mechyrdia is the most polluted planet in the galaxy, a title that it still holds to the present.

Notable Locations

Swamp Square

The capitol buildings of Mechyrdia, the Imperial Legislature and the Imperial Chancellery, are located at Swamp Square (Mec. Paloudlic Placj), at the rotational south pole of the planet. The name was chosen as an example of self-deprecating humor, as the politicians are calling their own capital a swamp.

Imperial Palace

The Imperial Palace is a station orbiting the planet, housing the Imperial Family. It is the most well-defended station in the entirety of the Empire, with thousands of particle cannon turrets, positron torpedo cluster launchers, several separate shield generators, and near-impenetrable hull armor.


The Hellevator is a massive series of elevators that leads from the top levels of the subterranean habitation to an urban complex near the mantle of the planet, named Hell (Mec. Helvet, Tyl. Helvet). Hell is the home of a massive geothermal power-generation complex that gives the rest of the planet electricity, as well as several hotels, apartment buildings, and themed restaurants.

The Mechyrd System

The Mechyrd system is the home star system of the planet Mechyrdia. It has seven planets: five terrestrial, two gas giant.

  • Wótan: A terrestrial mining world, consisting of a large iron core, a small mantle, and a thin crust. This planet has a large mining industry; the iron in its core is mined out by robots and teleported to cargo ships in orbit.
  • Suotówid: A terrestrial colony, with a surface covered in large amounts of iron oxide. It has habitable colonies both on the surface and underground.
  • Tivó: A terrestrial weapons testing world, covered in massive craters and ground-level butts of poisonous gas from centuries of weapon testing. It used to have a moon, but that was slammed into the planet to test the deadly power of massive impacts.
  • Mechyrdia: The capital planet of the Empire, this planet once had many biomes: snow deserts at and around the poles, tundra and taiga around the middle zones, and temperate plains and forest at the equator. Now it is a highly toxic ocean world with extensive subterranean habitation.
    • Ména: The larger of two Mechyrdian moons. Previously a barren rock world, Ména has been terraformed into a habitable world and serves as a massive suburb complex, with rows upon rows of identical houses.
    • Laiśtiancj: The smaller of the two Mechyrdian moons. Laiśtiancj is used as a massive computer complex, rented out to those who need heavy computation power.
  • Seþlancj: A carbon planet, with a surface covered in various hydrocarbons and tholins. Used as a mining world, with a fuel refinery in orbit.
  • Peroun: A brown drawf almost-star, with 3.2E27 kg of mass, this planet generates a large amount of energy from gravitational compression. This planet has a few colonies in its upper atmosphere, colloquially named "sky hives".
    • Onenneia: A terrestrial moon, with a hot metallic core, a flowing mantle, and a crust covered in sulfur compounds. High amounts of volcanic activity make it unsuitable for habitation. Interactions between its magnetic field and that of Peroun create large auroras on the moon.
    • Zrógia: A terrestrial moon, covered in ice with a thick layer of liquid water underneath. Traveling too close to this moon has been known to induce nightmares, hallucinations, and loss of sanity. For this reason, Zrógia has been classified as a Class 3 Cognitohazard.
  • Niórþer: A gas giant much smaller than Peroun, Niórþer is made of more heavy chemicals, such as water and ammonia, than it is of hydrogen and helium. This gives it the official designation of ice giant, differing from gas giants by composition.
Part of a series on Mechyrdia