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The Nivenian Empire is an Empire in the Cyrannus Galaxy notable for its compactness. While the Empire has no faster than light travel capabilities, and thus only holds one system, it has advanced megastructural infrastructure allowing it to support an otherwise unreasonable number of inhabitants.

System Edit

The system itself contains a close DB3.3/L2.4 binary pair less than two million kilometers apart, and has a M9.9V star orbiting 460 AU away. 13 planets orbit the inner pair, with the last two bound together gravitationally as a double planet. The red dwarf has 5 planets orbiting it, all of them frozen and inhospitable. The fifth planet from the first binary, Nivenia Prime, is habitable, being about 79% of the diameter and 51% of the mass of Earth. It has a gravity of 7.9938 m/sec^2. Unfortunately for non-Nivenians, the accretion disc of the primary makes the system too radiation-blasted to support life that had not evolved there for long-term occupation (short-term visits are fine). The location of the Nivenia System is shown below the infobox.

Proposal for Nivenian Empire

Government Edit

The government of the Nivenian empire is a technocratic dictatorship, with an election being held when the current ruler dies. Eligible voters include accomplished scholars, scientists, and engineers, and those with very high intelligence. Typically around 0.0025% of the population is eligible to vote, and voter turnout for those eligible is usually around 81%. A candidate is usually nominated by the previous ruler before their death, and anyone one administrative level below the ruler can run. The title of the ruler is Chief Executive Coordinator. Governors are called ringworld or planetary coordinators, depending upon their domain. Other official titles one level below Chief Executive Coordinator include Research and Development Director, Grand Admiral of the Fleet, Treasurer, Secretary of Industrial Improvement, and Secretary of Agricultural Productivity, in decreasing order of political clout.

Habitable Objects Edit

The Nivenian Empire mainly uses unorthodox methods to house population.

Ringworlds Edit

The building block of the Nivenian Empire is the Niven ring, or ringworld, a band encircling either the white dwarf or the red dwarf. Typically 25 meters of dirt and stone are on the surface of a ringworld, with 200 meters of structural material below that. For a white dwarf-based ringworld, almost seven kilometers of more structural material sit below the ringworld proper, suspended from each other by neodymium magnets. The ringworld proper spins at 593 km/s to generate 8.00 m/s^2 of gravity, while the bulk structural material is non-rotating so that the stellar gravity can be used to hold the ringworld proper in place (if this was not there, the ringworld proper would be torn to shreds by its own centrifugal tension). The material itself is composed of 90% poly(p-phenylene-2,6-benzobisoxazole) and 10% 6061-T6 Al-Mg-Si alloy. Carbon dioxide lasers protect the rings from meteorites and muonic fusion thrusters provide stability assist systems. Ringworlds based around the red dwarf have less bulk material as the gravity is stronger at the habitable zone. Note: the white dwarf has an accretion disk and is fusing the material that lands on its surface due to the extreme gravity, leading to a luminosity only an order of magnitude below sol.

The ringworlds orbiting the M9.9V-type secondary were the first ones built, 930,000 kilometers in radius and 12,700 kilometers wide. They were built with agriculture in mind, are 75% land and 25% water, and have the land capacity for 6.7 trillion Nivenians to farm conventionally on each one. 102 of these exist, with a total population of 683 trillion.

The ringworlds orbiting the DB3.3-type primary orbit between Nivenia Prime and Nivenia Secondus, at 42,000,000 kilometers in radius and 720,000 kilometers wide. These were also built with agriculture in mind (conventional agriculture is less expensive than hydroponics), and also have 75% land and 25% water. These contain the vast majority of the population of the Nivenian Empire, with each having the land capacity for 17,129 trillion to farm conventionally on each one. 28 of these have been built so far, but they only have a total population of 216,980 trillion.

Megastructure Maintenance Edit

The maintenance of a ringworld, while still small compared to the ringworld's construction cost, is still gargantuan. The ringworlds are composed of 5 km x 5 km 90% poly(p-phenylene-2,6-benzobisoxazole)-10% 6061-T6 Al-Mg-Si plates, held in a 6061-T6 Al-Mg-Si frame. The plates can be removed if punctured, and duct tape can be used as a temporary patch. The broken plates are taken to huge stations near the ringworld's sun, and recycled using the abundant solar power into new plates, which are then used to fill the hole covered in duct tape. While each plate has a half-life of 400,000 years, this still means that, for a ringworld around the primary, 12,119 plates fail and must be replaced every day. The station orbiting the primary is thus over six thousand kilometers in diameter (The station is a ring and is spinning very slowly so that it does not crumple into a sphere.).

Ecumenopolis Edit

Nivenia Prime is an example of a planet with everything completely maxed out. The normal difficulty for Ecumenopolises (planet-wide cities) is the removal of waste heat. The Nivenian Empire has found a way around this by just attaching giant radiators to 5% of the planet's surface, and using air conditioning (a reasonably effective method of using energy to put heat somewhere else) to heat these panels to 2800 K, effectively supporting the infrastructure to hold 15,394 trillion inhabitants. 20% of these Nivenians work simply maintaining the huge air conditioners, fusion reactors, mass transport systems, and Carbon Dioxide reprocessors needed on a planet with 15,394 trillion inhabitants. The planet itself is covered by five massive sheets of metal, each 2.5 kilometers apart, with skyscrapers in between. Air is constantly pumped upward to equalize pressures, and each cityscape has walls twice as thick as the one above it. The top layer is also covered in a cityscape, and orbital rings are accessible from here.

Aerostat Habitats Edit

The fourth planet from the close binary, Nivenia Secondus / RSC 5649-2399-4-2271-56 A4, has much the same gravity as Nivenia Prime, making it a suitable target for colonization (never mind the fact that it is a gas giant, we have a workaround). To colonize this planet, aerostat habitats were built in the 1.5 MPa region of the atmosphere by creating giant rigid aluminum spheres, expelling all the air, leaving a perfect vacuum inside, and attaching these to the colonies in question for buoyancy. These colonies currently hold 437 trillion, making them a common sight in the lower atmosphere. Carbon, nitrogen, oxygen, and hydrogen can be extracted from the atmosphere, turned into poly(p-phenylene-2,6-benzobisoxazole), and shipped to construction sites.

Another 181 trillion make their residence in the colder gas giant B3, in similar aerostat colonies. B3's industry fills much the same purpose as A4's. Interestingly enough, over twice the mass of earth has already been extracted from these gas giants to build ringworlds with.

Orbital Habitats Edit

A system-wide empire needs a system-wide transport system. When the system-wide empire has hundreds of quadrillions of inhabitants, seventy-two cubic kilometers of compressed soda can pull tabs must be transported to recycling centers every day. When hundreds of interplanetary freighters are needed just to transport pull tabs to recycling centers, the infrastructure needed for a homogeneous free-trade economy is staggering. 57 trillion workers are needed to pilot transport ships and another 89 trillion must work as clerks, accountants, supervisors, janitors, and all of the other necessary support professions needed. Trying to manage and house this system became insane hundreds of years ago. This is why large-scale orbital habitats were created. These habitats are connected to stations in "wings." Large stations may have dozens of wings, smaller ones may just have two. The stations around Nivenia Primus and Nivenia Secondus both have over two hundred, and dozens exist with more than twenty wings. Each wing is a hexagonal aluminum rod, five kilometers wide and 800 kilometers long. Six 80 kilometer-long spokes extend every 100 kilometers from the center in a hexagonal pattern, attached to 200 kilometer-long, 60 kilometer-wide O'Neill cylinders made out of the same 90% poly(p-phenylene-2,6-benzobisoxazole) and 10% 6061-T6 Al-Mg-Si alloy structural material as the ringworlds. These are small enough not to rip themselves apart, and usually have a density between a dense suburb and a full-blown city (although limited in the latter case to 10-floor buildings due to the structural integrity of the floor). On larger stations, those with more than six wings, the wings are attached to a larger hexagon (800 kilometers on a side), usually with a spaceport on the inner side of the hexagon opposite each wing on the outside. These hexagons are stacked, with the station proper suspended in the middle. The following image illustrates this:

Nivenian Habitat

These habitats account for 287 trillion Nivenians.

Mining Colonies Edit

The Nivenian Empire has colonized many of the planets, moons, and large asteroids in their system for strip-mining. The materials from these planets are vitally needed to continue construction of more ringworlds and habitats. 82 trillion Nivenians live and work on these colonies. Notable mining colonies include A11, A12, A12.1, and B4, with smaller bases on dozens of small planets, moons, and large asteroids.

Technology Edit

Nivenian Technology is absurd to the outside viewer. Although they do have some quite powerful technologies, they are confined to their own system and cannot use them offensively. Another major weakness is their dependence on actinides for initiation and compact power sources.

Nuclear Fusion Edit

The Nivenian Empire has a good grasp on two methods of nuclear fusion energy generation - the CNO process and muon-catalyzed fusion. CNO fusion reactors use QCD forcefields (see next section) to confine protium and traces of carbon to extreme pressures and temperatures to create fusion. A thermonuclear activation device is used to trigger the pressures and temperatures needed. If one of these reactors breaks, there is an absurd amount of energy inside that is usually able to be slowly vented through the top, creating quite a show for anyone within 300 kilometers.

Nuclear fusion spaceships also exist, both interplanetary and "interstellar." Interstellar is in quotes because, although nuclear fusion is no joke, single-stage fusion rockets can only achieve at most 0.15c, with even multi-stage rockets becoming ridiculously expensive beyond 0.55c. The current speed record for a fusion-propelled probe is 0.87c, though probes can get much faster using laser sail propulsion, up to 0.95c. The consensus among Nivenians is that ringworlds are much easier to make than interstellar colony fleets that take years to arrive.

Muon fusion is also used for boosting thermonuclear weapons. A weapon can be installed with a "thermodynamic confinement shield" to keep the energized plasma from expanding once the bomb has exploded, and a "muonic weapon booster" to turn the energy of the fusion reaction into high-speed muons. These will interact with any hydrogen on the target, triggering more nuclear fusion. This can boost the yield of a weapon tenfold.

Laser sail propulsion Edit

Approximately 0.1% of the sunlight of the system primary has been harnessed by Fresnel lenses and mirrors to provide a propulsion system for small probes and sometimes other stuff too (see section on R.K.M.s). These probes can reach 0.95c, but are mainly designed for short system flybys. The efficiency of the laser can be increased by bouncing the laser back and forth between a mirror on the spaceship and a mirror in orbit of the star. While the added efficiency diminishes in relativistic conditions due to redshift, almost all of the energy of the laser can be used to propel the ship. Note that these probes are extremely high-energy: a 500,000 kg probe (mostly equipment for transmissions) moving at 0.95c will have 98.19ZJ of energy, as much as 1.558 billion hirosima bombs. These probes are all designed to miss the primary by at least ten times the distance of the habitable zone, so as not to accidentally destroy any planets.

Grand Unified Theory and Quantum Chromodynamic Shields Edit

The Nivenian Empire has developed a working Grand Unified theory that unifies the electromagnetic, weak nuclear, and strong nuclear forces. As such, they have developed generators that can create potential energy walls using the strong nuclear force. Medium-strength shields are powerful enough to stop any hadronic projectile carrying less than 180 TJ/mol quarks (This would take 10 megawatts per square meter of electricity.). These shields are only available in sphere shapes, but the radius-potential energy function can be changed at will, allowing for the creation of larger, more spread-out shields to deflect kinetic projectiles. This is required since if kinetic weapons are used against most shields, the momentum will end up kicking the shield generator right out the back of the ship. These shields, while extremely powerful against most weapons, are useless against lasers, electron beams, and unconfined kugelblitz bombs. However, if the power suddenly goes out, the shields will contract almost immediately to a very small size, only pushing through whatever is inside it after the material has been compressed into a form of stabilized electron-degenerate matter.

Shields are especially useful for creating miniature fission reactors for portable power. For a given reactor, if the power gets too low, the shield shrinks, compressing the reactor and increasing criticality. If the power is too high, the shield expands, decreasing criticality. Although this is only useful with otherwise sub-critical fission power sources, it can extract every last joule of energy, leaving the reactor a tiny orb of hot, radioactive, electron-degenerate fission decay products, a perfect radioisotope thermoelectric generator for other uses. The percentage of fission energy going to the shield can be modulated to change the size and activity of the reactor.

Three geometries of shields are commonplace, with any other geometries being confined to research in the laboratory, spherical, parabolic, and toroidal shields, in order of increasing complexity. For the spherical and toroidal shields, the strength of the shield is directly proportional to the power per unit area of the shield (parabolic shields are similar, but they have shield strength proportional to the square of the distance to the focus on any point on the shield, instead of constant strength everywhere.).

Integrated Circuits and Artificial Intelligence Edit

Although extremely primitive by most species' standards, computerized systems are an important part of Nivenian life. Nivenians have recently upgraded their transistors from 250nm to 200nm architecture, now on par with late 20th century humanity. Despite this, they do have a few artificial intelligences (700 GW+, 40 city block ones with liquid nitrogen cooling) with capabilities similar to Richard Feynman. These are estimated to improve empire-wide scientific progress by ~32%.

Instability Edit

As the Nivenian race has an extremely high radiation tolerance, much of their technology is VERY radioactive and misuse could result in explosion (in the case of most nuclear technology), or implosion to electron degenerate matter (in the case of QCD shields). Stealing most of their technology is nigh-impossible and could result in you losing a finger. Or a continent.

The Brute Force Method Edit

A staple of Nivenian technology and culture is the brute force method: "If brute force does not work, you are not using enough of it."

Technologies in development Edit

Currently, the Nivenian Empire is working on ways to create and feed kugelblitzes to power kugelblitz related technology such as total mass-energy conversion reactors, kugelblitz drive to easily accelerate to 60% lightspeed, and confined kugelblitz bombs for armor- and shield-piercing capabilities.

Economy Edit

The Nivenian empire's economy is a quite large one (hundreds of quadrillions of workers are quite useful). The population can be split into 5 main strata: The capitalists, the management, the specialists, the workers, and the indentured servants. In the system, citizens generally separate out in the three middle strata by intelligence. Indentured servitude is usually the punishment for crimes (this is so the government can arrest people, force them to do work, and contract them out to fund itself while not charging taxes to law-abiding citizens), and is temporary. The capitalists are very few in number, but they own the means of production, and are very politically influential.

The currency unit in the Nivenian Empire is the credit. A credit looks like a slip of plastic that says "one credit," but if you have a nuclear material license you can go to the treasury and pick up a milligram of plutonium in exchange for the credit. The credit currency system is directly tied to the value of plutonium, as plutonium is incredibly energy-dense by volume and is crucial to most Nivenian technology. One credit is worth approximately 4 times as much as a 2020 United States dollar. Typical earnings are 1.8 to 3.5 Kilocredits per year for workers, 6.2 to 35 Kilocredits per year for specialists, 35 Kilocredits to 200 Megacredits per year for management, and anywhere between 40 Kilocredits and 10 Exacredits per year for capitalists. 65 percent of the population are workers, 30 percent are specialists, 4.5 percent are management, and 0.5 percent are capitalists. Moving from one stratum to another typically involves either starting your own business or climbing the corporate ladder for upward mobility, or making one or more important Nivenians mad for downward mobility.

The main products of the Nivenian Empire are food and energy. The food is produced by the surplus of farming areas on the ringworlds, and the energy by nuclear fusion.

The Megastructural Construction Corporation Edit

One of the largest and most influential corporations on Nivenia Prime is the Megastructural Construction Corporation (MCC). The MCC specializes in energy, land, mining, and construction, and is quite proficient in all three of those things. They are also estimated to control 41% of the Nivenian Empire's economic strength. They are a privately held corporation, and have been held by the same family, the Edwards, for almost 300 years. The MCC built all of the ringworlds and habitats, owns all of the fusion reactors, and has mining sites all over the system to extract more raw materials from noncolonizable planets. The MCC typically builds more ringworlds whenever the cost of bulk land rises to more than 8 Kilocredits per hectare. The Edwards family is quite influential, and has continuously held positions as advisors for over 150 years, and more and more they act as a shadow government. The Edwards generally spend their vast profits on the advancement of science for the MCC and the Nivenian Empire.

History Edit

The history of the Nivenian empire is actually quite long, but even worse, there is no clear division between when they were a planetary civilization and now, when they are capable of defending themselves from interstellar attack. For a detailed account of the history of the Nivenian Empire before 20 NE, see . For a detailed account of the history of the Nivenian Empire aft. For a detailed account of the history of the Nivenian Empire after 20 NE, see

Military Edit

The Nivenian military currently employs 1.13% of.

Military Edit

The Nivenian military currently employs 1.13% of the population of the empire. This makes it very powerful, but only within the Nivenia system. As the Nivenian Empire has no FTL, the scope of the military beyond the system is limited to R.K.M.s (Relativistic Kinetic Missiles). An article on the Nivenian defensive capabilities can be found here.

Relativistic Kinetic Missiles Edit

propelled by mirrors reflecting the light of the white dwarf primary, focused by Fresnel lenses to a tight beam, them bounced back and forth between mirrors in orbit of the star and mirrors on the back of the ship for the maximum energy efficiency. While a crust-melting missile can be accurately launched at a planet approximately every 6 hours, these missiles travel at between 80 and 90 percent the speed of light, and so cannot reach anywhere important in any reasonable length of time.

Foreign Affairs Edit

The Nivenian Empire has currently very recently made first contact with the New Cyrannian Republic, and currently has a mutally beneficial trade deal with them, trading 8 quadrillion tonnes of food for 4 trillion tonnes of refined Thorium-232 for use in breeder reactors every year.

Relations Edit

No Tariffs

Free trade is awesome.

Quotes* Edit

We are at least 17.382% sure that at least 0.0029218% of us know what we are doing

- A mid-level scientist on Nivenia Prime

*(Feel free to add more quotes.)

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