100th Millennium Wiki
100th Millennium Wiki

The Transear System is a star system in the Via Sagittaria Galaxy, under the control of the United Federation of Star Systems. It is one of the four terminus of the Translactean Hyperlane Network, making it a key transport hub in its galactic quadrant.



The star Transear itself is a typical yellow dwarf star (class G7.8 V).

While the star itself is relatively ordinary, it is surrounded by a number of Dyson rings which harvest the energy output of the star to feed the energy needs of the system's population. The Dyson rings are strictly regulated and consist of a large number of energy harvesting probes, with gaps in the rings to allow for light to pass roughly around the orbital plane and hence illuminate the planets and other bodies in the system. Around thirty percent of the star's luminosity is harvested, with a constant back-and-forth between the system's population and industrial energy requirements governing the quantity of energy harvested.

A number of orbital stations are directly orbiting Transear itself in low orbit, along with several swarms of O'Neill cylinders. Approximately 31 billion people live in close proximity to the star, mainly those working the Dyson Swarms.


Guerdh. seen here with orbital habitats removed from the image.

Guerdh is a dwarf planet which orbits Transear at a semi-major axis of 0.13 AU. The dwarf planet is tidally locked and has a diameter of 2,400 km, and despite its proximity to Transear it used to have two small asteroid moons in a tight orbit. Despite its close proximity to the parent star, Guerdh's surface temperature at 416 degrees celcius meant that there are no particularly extreme phenomena on its surface, making it host to the system's largest mining complexes. Although since the 86th millenium most of the less common ores have been depleted, Guerdh is still being exploited for transferrous metals in its interior, namely Nickel, Cobalt and Copper from its mantle.

Since the completion of the Translactean Hyperlane Network, increasing population on Transear has resulted in demand for human settlement in Guerdh. However, due to the risks associated with the mining planet's scarred surface and potential tectonic instability resulting from mantle extraction activities, direct settlement on Guerdh's surface is significantly restricted, leaving mostly miners who live there during their shifts. Around 900 million people live on Guerdh's surface. However, Guerdh's orbit, including its two asteroid moons, are not restricted, and due to the high exposure to stellar energy is quite popular for light industrial space installations. Mostly in space habitats, around 7 trillion people live in this region of space.

The two former asteroid moons of Guerdh technically still existed, but have been stripped of roughly half their masses each for construction of the space habitats, and they are used as the central tether to two of the largest orbital habitat swarms of Guerdh, appropriately named Guerdh 1 and 2.

Vastin's End

Vastin's End, here seen with Drydock.

Vastin's End is the innermost of Transear's three ice giants, revolving around Transear at a distance of just 0.2 AU. Aside from its close orbit and high temperature, the planet is a typical ice giant with a diameter of roughly 185 thousand kilometers, composed primarily of hydrogen, helium, and methane gas, with trace quantities of various other gases such as nitrogen and ammonia. The atmospheric composition was described by its discoverer as "as typical as an ice giant gets", with little to no exotic materials included. The planet itself didn't receive a name until fifty years after the system's settlement, simply being referred to as "Transear 2", until the accident of the gas freighter Vastin which crashed into a stray asteroid in its orbit and wrecking the ship.

Regardless of the unremarkableness of the planet, it is still a valuable source of fuel for Transear. Hydrogen harvesting operations are widespread on the planet, as its hot gases are less bound to the planet and is hence cheaper to extract and refine. Due to the abundance of fuel, Vastin's End is the center of Transear's shipbuilding industry, and many other space manufacturing activities are conducted in its orbit while chemical industries are on floating cities and factories in its atmosphere. The planet had eight moons, but as of 100,000 only two remained - its primary moon Drydock and its innermost dwarf moon Anchor. Both moons were named due to their position in the shipbuilding industry - final assembly of components are typically conducted on Drydock, and their first space launch would be a trans-orbital hop from Drydock's surface to Anchor's vicinity.

Most of the population of the planet and its moons reside on the surfaces, as the orbits are rather crowded with partially-assembled spacecraft and is often considered risky for O'Neill Cylinders. The Ice Giant's atmosphere is home to seven trillion people, living in various levels of the planetary atmosphere, with another trillion in various orbits around the giant and forty billion on Drydock. Drydock is often considered the densest planetary settlement in Transear, with factories and assemblies nearly covering its entire surface while homes and commercial areas reached deep into the moon's geologically inactive mantle.



Murit is one of Transear's two desert planets, and is the center for the system's planetbound heavy industry. It is tidally locked to Transear and orbits at a distance of 0.43 AU, and it does not have any natural satellites though it does possess a rather thick, mostly carbon dioxide atmosphere. It has a diameter of around 8,000 km. While its surface temperature averages at around 110 degrees celcius (partly due to increased greenhouse effect from industry), the increased pressure allows for small bodies of liquid water to remain across the planet's surface, typically near polar regions or at the terminator.

Its history is closely tied with the developments on Yerrabova, as its role as an industrial center originated from the gradual relocation of polluting industry from the habitable planet. While there is a large quantity of orbital manufacturing facilities and factories like Guerdh, Murit differs in that the majority of its industrial activities are conducted on the planetary surface, on both the day and night sides of the planet. Residential areas are rare in Murit, with the vast majority of its workers opting to live in orbit due to the chronic industrial pollution in the planet's atmosphere, but due to the sheer scale of the planet's industry there is still over 15 billion people staying on the planetary surface at any given time, typically in underground habitats or in the terminator area of the planet. This excludes people working in the industrial installations and various supporting businesses and activities, which in turn greatly outnumber the resident population.

The space around Murit has been described as an "organized Kesslerite mess". Orbits around Murit are parcelled out and traded, due to the large spaceborne population and limited space within the Hill Sphere, especially in the Low Muritian Orbit. Around 17 trillion people - 5 percent of the system's population - live within this area, which has its own separate government from the planet of Murit itself and primarily functions to ensure no collisions happen in orbit. The sheer number of O'Neill Cylinders and other habitats limit approaches to Murit's surface from interplanetary space to just six or seven lanes (depending on the orbital phase of the habitats), and hence most of Murit's trade are first shipped using non FTL vessels to mid-orbit before being transferred to larger FTL carriers.


Yerrabova is the system's only naturally occuring habitable planet, and is home to many of the most economically and politically important settlements on the system including the capital. The Transear sector, the region of space surrounding the Transear system, is also headquartered in Yerrabova, although these two governments occupy different parts of the planet and possesses some extent of rivalry against one another.


Apatos, and Apatos Prime (above)

Apatos is a large habitable, formerly desert planet which contains the largest chunk of Transear's surfacebound population. With a diameter in excess of 22,000 km, a 14-hour day and a revolution period of just under 2 years, it has been terraformed in the 9,400s in order to maximize its utility for the system's population. It possesses twelve natural satellites, the largest of which is simply known as Apatos Prime while the others are smaller captured asteroids. Apatos naturally possesses a ring system, but due to settlement and colonization of its orbit the ring system has been nearly depleted of mass in the past although it has recovered through artificial additions.

Although Yerrabova is the capital of Transear, the true bulk of the economic and commercial activity, excluding industrial and agricultural production, of Transear occurs on Apatos. Ranging from service and financial industries to high-end manufacturing, Apatos is the center of economy in Transear. One hundred trillion people live on Apatos and its orbit - of these, 15 trillion are surfacebound and the other 85 trillion are in either its orbit or its moons, Apatos Prime alone hosting a trillion people. While Apatos' relatively large Hill Sphere meant that the orbital vicinity is not too dense, the planetary government strictly regulates the colonization of parcels of orbits, as the largest amount of immigration into the system had been into Apatos and a number of incidents had occurred due to chaotic settlement.

The commercial activity in Apatos is not limited to the Transear system, and in fact it acts as the center for the greater Transear sector, which covers the entirety of the Transear sector and leaks into many neighboring sectors. The Apatos Commodities Exchange (which is actually located on Apatos Prime) covers nearly all major traded commodities in the Via Sagittaria, from minerals to machines to agricultural commodities and even labor. Quadrillions of C-Units worth of commodities are traded here on a daily basis just on the open market, not including any specific contracts between corporations and individuals signed in the offices and meeting places which dot the surface of Apatos Prime which amount to even greater numbers. There are also smaller exchanges dotting Apatos Prime and within its orbital influence which trade in niche or rarer commodities, from chemicals to complex electronics.