The Nivenia System 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 most of the system too radiation-blasted to support life that had not evolved there for long-term occupation (short-term visits are fine).
The primary itself has a mass of 1.14960 solar masses, and began as a medium-sized B-type star, and died billions of years ago, creating a massive carbon-oxygen white dwarf with strong He I spectral lines, giving it the DB stellar classification. The brown dwarf, weighing 0.0629713 solar masses, was formed from a massive hot jupiter that absorbed a huge amount of mass from the planetary nebula created by the death of the former primary, and fell into a lower orbit due to the resistance of the gas. This brown dwarf has a very high metallicity compared with the rest of the system, and so could not ignite nuclear fusion in large quantities and become a star. The secondary weighs even less, at 0.0396854, but still manages to fuse material due to its abnormally low metallicity.
Numerous changes have taken place in the system in the last few centuries. First, a significant portion of the light from both stars has been blocked by ringworlds. Second, several of the formerly icy and inhospitable worlds have warmed substantially due to waste heat.
The Nivenia System supports many of its inhabitants with ringworlds, circumstellar rotating habitats, mainly built by the Megastructural Construction Corporation and partially funded by the Nivenian Empire.
Radioactivity and Hyperdrives Edit
The accretion disc of the Nivenia System primary undergoes so much friction that parts of it are undergoing nuclear fusion, and releasing huge amounts of X-rays. While the thick atmosphere of Nivenia Prime protects it from the brunt of the ionizing radiation by shifting it down to ultraviolet or visible through fluorescence, most of the space in the Nivenia System is quite nasty for anything technological. Without proper shielding, most life would have problems surviving for extended periods of time, and most advanced technology gets fried. The radiation has a particularly damaging effect on hyperdrives, so only hyperdrives advanced enough to be able to transport at least their own weight in shielding will survive. While already-starfaring civilizations can come and go as they please, hyperdrive development is impossible, and has been labeled a crackpot idea by the scientific community centuries ago. This is true to the extent that reverse-engineering a hyperdrive built by another nation is seen as a crackpot idea as well.
The Nivenian species can survive the intense radiation due to its history. Nivenians evolved on a planet bathed in radiation, so, like all of the lifeforms that evolved on Nivenia Prime, the Nivenian species had to evolve, or become a blob of cancer from the radiation. The second reason is that the huge nuclear war in the 670s BNE and the constant use of unshielded nuclear technology afterward reduced the fertility, on average, of Nivenians who were less tolerant of radiation.
The Nivenia System contains an incredibly high population, which is mostly housed in artificial megastructures such as ringworlds, but a significant portion still live on planets. Great variety exists in the manner in which planets are inhabited, as conventionally inhabited planets, planets covered in distorted O'Neill cylinders for gravity-augmentation purposes, ecumenopolises, and aerostat-filled gas giants all exist in the system.
Entering and leaving the system Edit
Entering and leaving the Nivenia System both require extensive authentication from the Nivenian Imperial government, and the Nivenian Imperial government is not fond of tourism, so the Nivenia System is mainly visited by traders and political delegations instead of tourists. Usually, incoming vessels will be stopped at a station a few hundred astronomical units outside of the system, and their cargo and passengers will be inspected before being allowed to proceed. However, trusted clients such as JCompany are usually free to come and go as they please.
Inhabited planets and moons Edit
The habitable five Edit
Gas giants Edit
Smaller inhabited planets Edit
Non-planetary swarms Edit
Feel free to add your quotes here!
- The Nivenia System was named after Larry Niven, author of the Ringworld series.
- The locations of the RSC 5649-2399-4-2271-56 and RS 5649-1826-8-9514108-2562 systems are switched in this universe.
Nivenian Empire History before 20 NE, History after 20 NE Nivenian Military Demographics of the Nivenian Empire, Nivenian culture The habitable five: Nivenia Prime, Nivenia A12, Nivenia A12.1, Nivenia B4, Nivenia A11 Gas giants: Nivenia Secondus, Nivenia B3 Smaller inhabited planets: Nivenia B5.1, Nivenia A6.1, Nivenia A2, Nivenia A3, Nivenia A10, Nivenia A8.1, Nivenia A9, Nivenia A7.2, Nivenia A7.1, Nivenia A10.1, Nivenia A11.1, Nivenia A11.2 Swarms: A6 planet swarm Rouge Planets Thadus 0037