The Sagittarius Space Station, otherwise known as the S.S.S. or the Cluster Station, Spherum, Darrni'kol and various other names by the various alien nations who inhabit it, is the largest space station in the Milky Way as well as a major center of trade and diplomacy between the various nations in the Milky Way. It is also one of the most heavily populated artificial structures in the galaxy. it is located in orbit of Sagittarius A*.
Constructed between 74918 - 86450 CE, the S.S.S. is composed of one sphere the size of a standard supergiant star with seven spheres the size of a main sequence star connected to the main sphere itself. Each of these spheres is filled with laboratories, shops, holo-rooms etc. Each is connected by small indestructible tubes that are used by hypertrains which travel between spheres. These seven spheres each had twelve Jovian sized spheres attached to them, with a thousand Earth sized spheres attached to them as well. Each of these Earth-sized spheres is an artificial planet where entire civilizations have formed. It is the home of the infamous Sagittarius Bar and Grill, one of the largest and most famous bar and grill in known space.
The Sagittarius Space Station was originally brought to the Federation Council by a relatively young designer named Devon Collins. Collins was 103 standard years old in 73104 CE when he presented his initial design to the council as a proposed project that would be able to help unite the nations of the Milky Way at the very least in trade and negotiation. He initially hoped to unite the entire Milky Way under one banner similar to the old Earth European Union, but it was soon pointed out that each nation at the time was too different to unite under one banner.
The Federation Council initially rejected the design as it was deemed too impractical at that time, but they did instruct Collins to not trash the project as new ways of interstellar construction were constantly being developed.
A hundred years later, when Collins was 209, he presented his second revised project to the council. The council deliberated this time and decided to allocate funds to construct a small version, a Neptune sized sphere with three terrestrial spheres connected by the hypertrain tubes to the main sphere and to each other. This became the first iteration of the S.S.S. and it took over a thousand years to construct. Construction was completed in 74351 CE around Sagittarius A* which had been declared neutral space by all Milky Way nations, human and otherwise.
Within the first twenty years of construction of the initial S.S.S., almost all Milky Way nations applied for space on the station as a means for cultural and political exchange between the nations. The space on the station, despite being incredibly large, began filling up over the course of the next four hundred years.
Each nation represented in the S.S.S. met on June 23, 74915 CE and began to organize the construction of an altered design based off of Collins' original proposal. Three years later after having finalizing all the details on which nation was responsible for which construction, the original S.S.S. began to be expanded upon.
Station construction began on February 21, 74918 and ended on August 21, 86405.
Construction on the station went through its own various problems, the largest being the Sagittarius Strikes which lasted for eleven years from 79814 to 79825, during which a worker from one of the newer human nations demanded better working conditions as by this time the working conditions had grown to become unbearable not just for humans but for almost all other races working on the station as well. This initial strike spread among the workers among nearby spheres. The strikes became the basis for the Sagittarius Worker's Accord, an agreement between the various nations of the Milky Way and the workers on the station in which the builders would work but would be ensured the safest of working environments.
Another issue that arose came about in 80015 due to an unprecedented shortage of construction material. The artificial material used to construct the station began to run out for reasons that to this day are unclear. The Cluster Shortage lasted for five years until a new source of raw materials was discovered.
On August 21, 86405, the now completed space station, in a secure orbit around Sgr A*, officially was completed. The last sphere, one of the thousands of Earth-sized artificial planets, was completed and opened to the public.
The space station remains the largest non-Dyson Sphere related structure in the Milky Way.