Eithlinn

Eithlinn is a habitable moon in the Milky Way. The moon is the homeworld of the Dotsk and is capital of Dotskgard. It orbits the gas giant Tuirne. The entirety of the Tuirne system has a population of 145 Quadrillion, making it the most populous system in the Milky Way. Eithlinn is the largest moon orbiting its planet as well as the largest terrestrial object in its system. The moon orbits a Brown Dwarf three astronomical units away, making the tidal heating caused by its proximity to Tuirne its main source of warmth.

Accompanying Eithlinn are over forty other spherical moons. The largest of which are Anamnesis, the financial capital of the Confederacy of Borealis, Mys, and Roid. Eithlinn is about seventy percent as massive as the Earth, while its parent is fifty percent more massive than Jupiter.

History

The planet first formed 9.77 billion years ago around Tuirne. It was likely that its parent was a rogue planet captured by Medb, the Brown Dwarf it orbits almost 11 billion years ago. The planet first gained oceans roughly 6.6 billion years ago and gained life 5.1 billion years in the past. In the long history of the planet, there were far more asteroid strikes due to the large gravity of its parent, hence why the planet took so long to develop life compared to its age.

Multicellular life appeared on the planet 1.1 billion years ago and shortly after started living on the land 900 million years ago. The large amount of volcanic activity on land offered large amounts of nutrients for these life forms, making land a great place for the organisms to live.

The Dotsk

The Dotsk emerged in 120,000 BCE and quickly developed agriculture as there was no ice age to inhibit them like it did with humans in 100,000 CE. From there, they took another five thousand years to develop metallurgy and enter into a bronze age, quickly replaced by an iron age later that millennia. Much like most species, they had tribalistic tendencies and formed their own nations and economies.

The Dotsk had no access to oil on their planet, they used geothermal power for everything. The lack of oil but abundance of volcanism made this an easy choice for them. As they slowly industrialized, they began spreading to every corner of their planet, bringing technology with them. After several wars, they entered a period of globalism in which the economies of their various nations became more and more interconnected. During this same period, they began landing craft on their accompanying moons. With no threat of climate change, due to the irrelevance of sunlight and the lack of oil, the Dotsk were quickly able to form their planet into an ecumenopolis. There were no limits, they had access to the easiest form of power.

Type I

Eithlinn was fully under the control of the Dotsk by 17,000 CE. Around this same time, the whole of the Tuirne system was being colonized and Eithlinn became an ecumenopolis. Their first mega structure was not a Dyson Swarm, like most civilizations, but a massive orbital ring around Tuirne. This ring was made up of the hundreds of asteroids orbiting Tuirne. With this ring they were able to start gas giant lifting the planet to gather large amounts of Helium 3 to power their ever-expanding nation.

Type II

One of the few planetary systems to become Type II without a dyson swarm was Tuirne. With huge arrays of Fusion reactors, they were able to generate the power required to attain Kardeshev II status. Without things such as plants or a home star, they never developed the concept of Dyson Swarms. Instead, they just kept building up their home system. Soon, they had hundreds of rings around their Brown Dwarf, lifting huge quantities of material to build up their civilization. Other planets in the system were moved around Tuirne as it very quickly became the proverbial center of the Dotsk. Over 99% of Dotsk lived within one light-second of their home world.

Contact

Eithlinn and the moons around it remained where the vast majority of Dotsk lived. They continued advancing their own system with little regard for the outside universe. Their own system could support quintillions, so they had no reason to leave. As they remained in place. population growth slowed, but advanced technology made death a rare occurrence, so this mattered little.

When the LaC first contacted the Dotsk in 15,671, they quickly had the Dotsk join as a single-system-state called Dotskgard. Despite being the smallest of the new states, they were instantly one of the most influential. The population swelled as people immigrated in as well as the government started funding population growth programs to make the stagnating population start growing again to maintain their status as the most populated system.