capital worlds of the solar federation
Earth:
The ancestral homeworld of humanity is now becoming slowly overshadowed by human colonies on other worlds, the biggest of these being Sirius. Often called the new earth, most of earths wildlife and nature was transported to sirius as earths collapsing ecosystem threatens to cause a mass extinction of animal life.
Despite this, earth is still home to 150 billion humans and other species and holds important cultural sites. From the most ancient of ruins to the first megacity constructed in japan.
Most life on the planet is concentrated in these megacitys, with anything outside them considered uninhabitable. The abandoned ancient cities here have been overtaken by nature, and becoming home to gangs of looters scavenging anything left behind.
Earth is considered a very expensive world to life on, despite the standard of living for 99% of the population being far below that of human colonies across space.
The Richest of the population live in skyscrapers above the clouds, or floating cities in orbit. The air and rain in many of the megacitys is somewhat toxic, to be largely indoors. Parks are build to simulate the outside, and a artificial sky at least gives the illusion of a clear sky.
80% of wildlife has gone extinct, with the remaining few being transported to sirius.
Scientists have luckily managed to bring most animal species back from extinction trough cloning, however some are sadly lost forever.
However in recent years, thanks to the help of therian terraforming technology, a massive ecological restoration project has begun thats estimated to have restored earth by the year of 2850. So many hold hope that even in her rough condition, the homeworld of humankind can be saved.
Due to climate change, the average temperature of earth is around 19°c, wich caused mass flooding and eventually ecological disaster. The planet has 24 hour days with 365 days in a year.
Silakare:
The new homeworld of the Therians, silakare is a beautiful world of lush purple plant lifes and shallow warm oceans.
The world's surface is uninhabited, as the avian therians life in floating cities kilometres above the ground.
Silakut was the original homeworld, wich was destroyed by a supernova that was scientifically impossible and is still not understood. Silakare was once a dead moon with a barley existing atmosphere, but thanks to therians advanced technology they managed to turn it into the paradise it is today.
Animals from their old homeworld were genetically modified to life on the terraformed world, wich was transformed to resemble their old home as closely as possible.
Since then, the floating cities of silakare have become the official capital of the solar federation, with the largest of the cities being Orlos. Wich boasts a population of 240 billion and has a reputation for being a melting pot of cultures from all member species of the federation.
Silakare is relatively cold despite its tropical appearance, with temperatures around 9 degrees most of the year. A day has 32 hours with 409 days in a year.
Zadrik:
Homeworld of the Ilgorans. Its the smallest of the capital worlds, around the size of mars.
Its surface is covered in the ilgorans iconic city trees, enormous tree like plants specalized to grow into massive towers and house thousands of ilgorans.
In many ways zadrik is a lot like earth before the ecological collapse of the 25th century, with lush forests of red plants and the chirping of the slugbirds in their canopies.
Like the ilgorans, most life on zadrik is comparable to molluscoids. Most have a hard shell of sorts and posses a soft inside with hermaphroditic reproductive organs.
The planet itself is actually a moon orbiting the gas giant of Zuldrun, wich is often seen as the shell of a deity in ilgoran religions.
Zadrik is moderately warmer than earth at 31 degrees, with 19 hour days and 290 days in a year.
Thaul:
Home of the Vardee, and the biggest known habitable world in explored space.
This size is likely due to not being formed naturally, instead being artificially constructed 300 million years ago. The core is theorized to have been a smaller moon of planet that was artificially turned into a planetary core. Massive towers hundred of kilometers wide run from the surface to the core, likely as some sort of maintenance system.
Underneath the surface are tunnels that run underneath entire continents, and go even deeper into unexplored areas of the planet.
The vardee and many other animals of thaul likely descend from pets that these ancient “architects” kept.
This is evidenced my murals that depict these architects and being that looks strikingly similar to a lot of lifeforms inhabiting thauls oceans and continents. The architects themselves seem to have been somewhat humanoid, or at least bipedal. Sadly most murals are extremely eroded and damaged, making it hard to make out details.
Vardee build their cities in the massive towers that run to the core, wich are large enough for each tower to act as its own nation.
Most of the towers have only the first few hundred floors explored, many of wich have been flooded or house entire ecosystems of subterranean lifeforms. The deepest any explores got was floor 450 In the tower city of zulkran which is also the planetary capital. The bottom most layers were filled with overgrown ruins of buildings, home to entirely unknown blind animals. After DNA testing, it was revealed that these were actually the closest living relatives of the Vardee, with a 97% match.
The vardee rarely travel outside of the massive tower cities, meaning large portions of thaul are mostly uninhabited and wilderness. They take great care and pride in this wilderness, it even being a afterlife in some believes.
The average temperature of thaul is 16°c. Days are 30 hours long and a year lasting for 490 days.
Lirthak:
Home to the Olorans, and the most unique of the planetary capitals.
The planet itself looks like a barren rock from the surface, however underneath is a expansive cave system large enough to house forests, oceans and steppes of bioluminescent grass.
Olorans evolved in these steppes as lirthaks equivalent to herd animals, eating the blue glowing grass with their prehensile and dexterous tongues. This combined with having to find strategies to outsmart predators aswell as remembering the layouts of the cave system lead to the olorans extreme intelligence.
Over time they developed an advanced civilization with technological wonders rivalling the therians. With the cities becoming overcrowded however, they sought to see whats outside of the cave systems. They were aware that there was something outside of it, but this was only realy discover relatively recently thanks to modern technology. Problem was, there were only a few dozen exits out of the cave systems, and these lead to the uninhabitable surface of their homeworld.
So the top scientists and engineers got together to build massive domes on the surface, wich were then artificially filled with ecosystems and cities.
After this, oloran civilization was never the same. Soon after they constructed their first off world colonies, and travelled outside of their home system.
With the megacorporations that rule oloran civilization needing space for their manufacturing and housing the population of the overcrowded cities, two rings were build using material from lirthaks 2 moons. The olorans had no sentimental attachment to the moons due to not even knowing about their existence only decades before, and being as pragmatic as they are simply saw them as unused construction material orbiting their homeworld.
These rings now house everything from entire sectors of industry, housing, city sized malls, megacomputers, farming sectors and even artificially created beach resorts for tourists.
Lirthak and its two rings now have the largest population of any planet in the galaxy, with a grand total of 990 billion people calling it home. Its predicted to reach 1 trillion inhabitants by 2790.
The cave systems of lirthak are very cold due to not having sunlight, with average temperatures around -30°c. The rings are kept at around 20°c. A Lirthak day is 15 hours with 270 days in a year.