100th Millennium Wiki

The Nyrin Galaxy is a small, low metallicity spiral galaxy, and is the smallest spiral galaxy in the universe. Being one of the closest satellites of the Florathel Galaxy, the Nyrin Galaxy has recently been under a lot of tidal forces, which has deformed it to the point that one of its two distinct arms has been nearly erased into the galactic core. As a result, star formation is rampant throughout the galaxy.

Being a relatively low metallicity galaxy has kept Nyrin from developing many civilizations in the past, and any civilizations that arose would be able to take control of the entire galaxy without many obstacles. However, a recent surge of star formation (not enough to quickly exhaust the galaxy's gas supply though) has seeded the galaxy with many heavy elements, which has allowed a lot of lifeforms to develop.

Galactic structure

The Nyrin Galaxy has two spiral arms, known as the Kael Arm and the Aghori Arm. The Kael Arm is distinctively smaller than the Aghori Arm. Along with the Core, most of the mass in the galaxy is concentrated in these 3 areas. However, a significant amount of mass can also be found in the Hinterlands, far away from the spiral arms. Here too, star formation is happening, and many new civilizations are popping up.

The Nyrin Galaxy contains 813 million stars, relatively little for a galaxy of its size. At the centre of the galaxy there is a supermassive black hole, known as Eyerin, with a mass of 2.51 million solar masses.


The Core contains some of the oldest stars in Nyrin, and is the oldest part of the galaxy. The large amount of cool, dying stars gives the Core a yellowish tinge. However, recently, an extreme burst of star formation happened in the centre of the Core, near Eyerin, which has resulted in many massive clusters, brightening the Core overall and whitening it. The core contains about 244 million stars, while the Outer Core contains about 145 million, 66 million in the northern part and 79 million in the southern part.

Kael Arm

The smaller of the two arms, the Kael Arm has severely shrunk since Nyrin entered a close orbit around the Florathel Galaxy. As a result, star formation rates are unsustainable and the highest in any region of the galaxy, but for some reason, there are not many large nebulae visible from outside. The Kael Arm is quite inhospitable due to the sheer amount of star formation. The Kael Arm contains about 97 million stars.

Aghori Arm

The larger of the two arms, the Aghori Arm has a stable, albeit high rate of star formation. Many large nebulae are visible from outside, especially in the inner part of the arm. Life is more common here than in most of the galaxy, with rates comparable to those found in other galaxies. As the People's Union of Kuruva's power has waned, many nascent civilizations are arising, but there is limited space. The Aghori Arm containins about 193 million stars, 129 million in the inner part and 64 million in the outer part.

A map of the Nyrin Galaxy


The outer reaches of the galaxy. The Hinterlands are the result of an older wave of star formation, and there are many evolved massive stars in the region, giving it a distinct blue sheen. This region is actually quite quaint, as star formation is slowing down to a more sustainable level. A few civilizations are developing in these far off regions. This area contains 134 million stars, 81 million in the northern part and 53 million in the southern part.

Distribution of structures

Up until the last billion years, the only large-scale structures in the galaxy were 3 globular clusters floating around the galaxy, along with the Kuruva Cluster, and the central cluster.

When Nyrin approached the Florathel Galaxy, the tidal forces kickstarted star formation again, which allowed more large structures to exist, such as nebulae and clusters. The new influx of stars meant more chances of habitable planets, as well as more luminous massive stars to illuminate the skies of those planets.

Clusters, massive stars and H II regions

Until the last billion years, only 5 star clusters existed within the galaxy, 3 of which were globular clusters, one of which was the Kuruva Cluster, and the other one was the one surrounding Eyerin. As star formation restarted, the number of star clusters rapidly increased. As did the amount of emission nebulae (housing young massive stars), whereas 1 billion years ago, none existed within the galaxy. The nebulae and clusters are currently most concentrated in the inner Aghori Arm, making many worlds in the section of the galaxy popular tourist destinations. The same can be said for massive stars, which did not exist in the galaxy for about 10 billion years, until the last billion years, when their numbers increased dramatically. Currently, Nyrin houses a healthy (not too large) population of massive and luminous stars, including 46 known Wolf-Rayet stars.

Habitable planets

Because there has not been any star formation until 1 billion years ago, many of the stars which formed in the initial burst of star formation 13-12 billion years ago have died, including all the stars whose masses are above 1 solar masses. Many of the stars whose masses are above 0.8 solar masses have left the main sequence, and most stars from the new wave of star formation are too young to develop habitable worlds, although some have. Therefore, this leaves predominantly old, low-mass stars as the stars for potential habitable planets, and because these systems are so old, they have had many chances to be disrupted by every possible cataclysm.

These factors, compounded by Nyrin's very low metallicity (therefore making it harder to form habitable planets) means that there has historically been very few habitable planets in the galaxy, and so little chances for civilizations to arise. Ripal is a rare example of a planet being habitable enough for it to develop a civilization, and it orbits a late-K dwarf. In fact, until the last few hundred million years, it was the only civilization that really stood the test of time by surviving for millions of years, which was possible due to Nyrin's extremely slow pace of life at that time. After the galaxy's rejuvenation, the possibility of widespread habitable planets was a reality again. Over the last 400 million years, many civilizations have sprung up on new habitable planets, which are becoming more and more common every era.

Civilisations and Nations

As Nyrin has such a low metallicity, heavy elements which are very important to civilisations are much rarer, and less can be used to further a nation's influence than in a more chemically evolved galaxy such as Florathel. This results in small, impoverished nations with little access to important elements, which is what has been repeatedly observed in the less chemically evolved areas of the galaxy, i.e. the outer cores and the hinterlands, less so in the arms due to the ongoing metallicity increase due to intense star formation. These impoverished nations would have to fight over what nations in, for example, Florathel, would consider as quite small amounts of important metals.


Formation Era (6.362 - 5.9 Gyr BCE)

The Nyrin Galaxy forms, in a far-off corner of the universe, about 180 million years after the beginning of everything. At the time, star formation rates were extremely high, unrecognisable from today, and the metallicity of the universe was so low that life as we know it couldn't possibly exist. At that time, it was an amorphous blob of gas and stars, and it wouldn't be until after the end of the era that the galaxy's characteristic spiral arms appear. Nyrin's central black hole, Eyerin, was an extremely luminous quasar, and started to stop star formation by heating up previously cold gas, which would make it impossible to form stars. The many incredibly luminous stars in the galaxy had the same effect on star formation.

Reformation Era (5.9 - 4.7 Gyr BCE)

The Galaxy takes shape, and several arms begin to form. Star formation slows down rapidly due to Eyerin, grinding to a near complete halt, and over time, the spiral arms merge into two opposite arms.

Quiet Era (4.7 - 0.78 Gyr BCE)

Not much happens during this era. Star formation slowly dies out, and by the 4 Gyr BCE mark, its effects on the galaxy become negligible. The galaxy takes on a deep yellow hue, filled with dying stars and stellar remnants. Sometimes there is the occasional civilization here and there, but there are so little opportunities for life to arise that any effects of civilizations on the galaxy are barely noticeable. The galaxy slowly dims, as it wanders around the universe, barely noticeable against the background radiation of the Universe.

Revitalization Era (780 - 393 Myr BCE)

As the Nyrin Galaxy approached the Florathel Galaxy, tidal forces exerted by the Florathel Galaxy along with its large satellites reignited star formation. For the first time in 4 billion years, bright blue massive stars came into being again, lighting up the almost invisible galaxy up from inside. As the metallicity in the galaxy's environment started to increase for the first time, opportunities for life to get started became more and more common as Nyrin approached the Florathel Galaxy.

First Life Era (393-129 Myr BCE)

393 million years ago, the first of many new abodes of life resulting from the increased opportunities for life sprung up, in the Southern Hinterlands, an opportunity . Over the next 264 million years, 22 other worlds with life would spring up, on their course to becoming a civilisation.

Kael Arm Explosion

About 129 million years ago, millions of years of extreme star formation in the Kael Arm led to what is now known as the Kael Arm Explosion, in which about 170,000 massive stars exploded in a span of 240,000 years, destroying every possibility of life there for some time.

Second Life Era (129-22 Myr BCE)

Even more life abodes sprung up during this period, and some started to get close to developing a civilisation, most notably Ripal.

First Nyrin Wipeout

About 22 million years ago, a huge starburst event rippled through the galaxy. Starting in the Southern Hinterlands, it spread through part of the Aghori Arm before going through much of the Northern Hinterlands, some of the Northern Outer Core and finally most of the Kael Arm, decimating most life-bearing worlds in those areas.

First Civilisation Era (22-7 Myr BCE)

The period following the First Nyrin Wipeout saw the emergence of intelligent life in Nyrin, and the founding of the first civilisations in Nyrin. After they became interstellar, they quickly expanded and approached each other. Tensions between nations rapidly intensified, which eventually resulted in the Second Nyrin Wipeout.

Second Nyrin Wipeout

About 7 million years ago, a huge war broke out between the nations of the Nyrin galaxy, which was extremely devastating to everyone involved. Not very much is known, but what has been found from records of the war indicates the use of things such as artificial gamma-ray bursts, artificial supernovae (both type I and II), and other stellar-related weapons of mass destruction. The death toll is estimated to be in the quintillions.

Decay Era (7-3.6 Myr BCE)

After the Nyrin Wipeout, the galaxy was left in ruin. The rest of the nations which were still around saw their societies crumble to nothingness, and the astropolitical stage of the galaxy was empty for a long time. Things started to become normal again over the next 20 million years, when civilisations start appearing again.

Telusian Era (3.6-3.2 Myr BCE)

Around 3.6 million years ago, the first Telusian settlers visited the Nyrin Galaxy, and were quite astonished at what they saw. The galaxy seemed like a good place to settle in, and they slowly advanced through the galaxy. However, the exploration of the galaxy did not receive much funding, definitely not as much as in the Florathel Galaxy. Due to insufficient funds and Nyrin not being the most resource-rich galaxy, most of the Telusian settlers left for their home galaxy, or the Florathel Galaxy. However, some of them stayed, becoming self-reliant and splitting away from their parent empire in the process and creating the Nyrin Telusian Commune, a relatively large nation in the Northern Hinterlands.

Premodern era (3.2 - 0.43 Myr BCE)

This is the period of time where some of the oldest nations currently in the galaxy start to emerge. However, there are not many powerful nations in the galaxy at this moment.

PUK Era (430,000 - 0 BCE)

About 530,000 years ago, a nation known as the People's Union of Kuruva, a "socialist democracy" started to spread across the Nyrin Galaxy. At its time, there were not many powerful civilisations, and the PUK expanded across the galaxy with relative ease, albeit quite slowly. By the 200,000 BCE mark, the PUK controlled all of the inner Aghori Arm (where it originated), some of the outer Aghori Arm, all of the Core, and most of the Outer Core. Over time, it got more and more control of its citizens, to the point where they were literally being mind controlled by the PUK, which ruled nearly all of the Nyrin Galaxy with unparalleled stability and without interference.

As the other nations grew stronger, the PUK wanted to keep its iron grip on most of the galaxy. It did so by attacking forces of nations which came too close, all the while expanding and assimilating huge areas, sometimes which belonged to nations, at a time, and forcing any populations in those areas to join the nation. The other nations in the galaxy were certainly not happy with what the PUK was doing, and were trying to find a way to stop it from expanding.

Peacekeeper Incidents

About 150,000 years ago, the other nations found how to stop the PUK from continuously expanding. They knew that the PUK controlled their citizens using megastructures known as "peacekeepers", which surrounded massive stars which were stabilised. If the peacekeepers could be broken, the minds of citizens of the PUK would be freed. The nations tried this by aligning a rapidly rotating dying star towards one of those peacekeepers. The beam from the gamma-ray burst quickly reached the target peacekeeper, and was able to destroy it, causing several trillion PUK subjects' minds to be freed.

They found themselves in a world of oppression, and did not think in the slightest that it was right or that they wanted to stay in it. However, the PUK immediately got notified of this and sent several armies to kill them before things got out of hand. Although the vast majority of them got massacred, a few dozen subjects escaped the planet they were on. When they reached space, they saw the carnage that had happened, and realised the huge opportunities that arose to free all the beings from the PUK.

Several more peacekeeper destruction events occured over the next few thousand years, using multiple techniques which were easier to control than using dying Wolf-Rayet stars. By 46,000 BCE, the PUK was aware of what they were doing and cracked down on it by improving the structure of the peacekeepers, but as they did so, they temporarily ended mind control in citizens of the PUK. It was a grave mistake, as all mind control ended outside the PUK's territory because there weren't any peacekeepers to mediate the control. Billions were made aware of this and they escaped the borders to the closest habitable worlds.

Many of them were made aware of what was happening on Kembar and they all fled there. At Kembar, they decided they would try to free as many as possible from the mind control exerted by the evil PUK, which had enslaved multiple species on its way to Nyrin domination, and they founded the Republic of Kembar, whose aim was to end the PUK and its disturbing practices. This would be the beginnings of the Northern Revolution, a bloody 13-millenia-long war which had severe implications for everything in the galaxy.

Northern Revolution

In 45,385 BCE, the Republic of Kembar devised a way to get rid of peacekeepers even with the PUK's new improvements, by shooting strangelets at them. This was possible because under the supervision of other nations, and only possible when the RoK learnt how to control strange matter. The nations involved found out that the PUK had built many smaller peacekeepers to serve as backups in case the larger ones got attacked. This would make it harder for the RoK to do what they planned to do, which was to liberate as many people as possible from the PUK, if not destroy it from the inside.

They started firing small, practically undetectable strangelets at the peacekeepers. After a while some of them arrived at the peacekeepers and quickly dissolved them into tiny glowing balls, forcing the backup peacekeepers to come online. The short delay allowed yet more people to escape the authoritarian confines of the PUK and join the cause for ending the nation from inside, and now the RoK's population rose to 20 billion. The PUK immediately noticed and quickly tried to retaliate by sending multiple strangelets towards the RoK's facilities. However it miscalculated and the strangelets hit a generational ship headed for a distant star system. This angered the RoK, enough for them to retaliate and send many big strangelets headed for the nearest peacekeepers, and since the PUK's borders are defined by the extent of these structures, this would take away quite a bit of the PUK's territory.

These reached the peacekeepers around 44,800 BCE, and destroyed a huge number of peacekeepers in the outer core, facing the north. Trillions were liberated and they were faced by huge armies which were sent to deal with them. They quickly turned against the nation which had kept them in check for their entire lives and began to construct a plan to destroy as many peacekeepers as possible. There was a huge massacre at the site which turned the survivors completely against any thought of helping the PUK or even letting it exist. Some of them went to Kembar and talked to the RoK about ways to destroy the peacekeepers and free the citizens of the PUK, while others went full steam ahead, went up to the peacekeepers and started destroying them.


The future of Nyrin is very uncertain, at least the astropolitical scene. While it is certain that the PUK's days are numbered, nobody is certain of when exactly it will fall. The disappearance of such a huge nation will certainly create an enormous power vacuum in the centre of the galaxy, and what happens next, let alone what will fill the gap is almost unknown. There are many many possible scenarios suggested by many respectable people all over the subcluster as to what may happen, but the general consensus seems to be that several new nations will probably form out of the remains of the PUK. This will definitely have happened by 5 million years in the fuutre.

The future of Nyrin as a galaxy is much less undetermined. It is almost certain that its spiral structure will be destroyed by the tidal forces of Florathel, and then huge bursts of star formation occur. The outer stars will be stripped off the galaxy into a stream circling Florathel, and the galaxy will slowly shrink as it shrivels up into an elliptical galaxy and be torn apart by Florathel and eventually be incorporated in its structure. Life will become rarer and rarer in the stellar streams that once were Nyrin, and one day, in the next few billion years, it will become impossible again. Nyrin, now incorporated into Florathel, will slowly darken over the next few trillion years, and soon all which will be left are the remnants of dead stars, slowly circling the central black hole.

Incredibly Far Future

After about a decillion years, even these remnants will be erased off by proton decay, and there will be nothing left of the galaxy, except photons, subatomic particles and black holes. Nyrin will be but a part of Florathel, in this time merely a huge system of black holes, orbiting the central black hole, but even this doesn't last forever. Hawking radiation will take its toll on the black holes, reducing them all to mere particles of light, all alone in the huge universe. In a googol years, Florathel's central black hole now completely alone, will finally explode, and after that, nothing recognisable will be left of the once rich galaxy.



Anything in bold is considered to be a major event.

BCE - Before Common Era

CE - Common Era

Before Common Era

6,497,000,000 BCE: - Eyerin forms, in a distant part of the very young universe.
6,362,000,000 BCE: - The Nyrin Galaxy forms.
6,213,000,000 BCE: - Eyerin becomes an AGN and quasar, stifling star formation in the galaxy.
5,740,000,000 BCE: - Eyerin calms down.
5,400,000,000 BCE: - Nyrin's spiral arms start to appear.
5,180,000,000 BCE: - The Kuruva Cluster forms.
5,030,000,000 BCE: - There are no more emission nebulae regions larger than 100 light years in diameter.
4,560,000,000 BCE: - The Remiad System forms in the Kuruva Cluster. (± 20 million years)

- The last O-type star in the primordial Nyrin dies.

4,450,000,000 BCE: - The Vigimir System forms.
4,000,000,000 BCE: - The effects of star formation on the galaxy becomes negligible.
3,800,000,000 BCE: - The Kuruva Cluster is the only place in the galaxy capable of forming stars.

- A civilization exists in the Northern Hinterlands for about 1,500 years.

3,700,000,000 BCE: - The population of B-type stars falls to 0 for the first time.
2,990,000,000 BCE: - Life arises on Ripal.
1,500,000,000 BCE: - Nyrin starts to drift towards the Florathel Subcluster.
940,000,000 BCE: - An O-type star forms, for the first time in 4 billion years.
920,000,000 BCE: - Nyrin becomes the closest galaxy to Florathel for some time.
675,000,000 BCE: - A large H II region is created for the first time in about 5 billion years.
393,000,000 BCE: - The life resulting from the metallicity increase is born.
129,000,000 BCE: - The Kael Arm Explosion occurs, destroying all signs of life in the area.
55,600,000 BCE: - The Blossom Nebula forms around the Kuruva Cluster.
22,000,000 BCE: - The First Nyrin Wipeout devastates a huge part of Nyrin.
6.910,000 BCE: - A huge war breaks out between the dominating nations of Nyrin, which destroys almost all traces of society within the galaxy.
3,600,000 BCE: - Telusians enter the galaxy, in search of resources and controlling the galaxy.
3,200,000 BCE: - Most Telusian settlers leave the galaxy.
3,070,000 BCE: - The Intergalactic Telusian Commune is created on Mirin.
430,000 BCE: - The People's Union of Kuruva is founded.
290,000 BCE: - The PUK reaches Eyerin.
48,995 BCE: - The first peacekeeper event occurs, seeding the beginnings of the Republic of Kembar.
45,914 BCE: - The Republic of Kembar is created to stop the PUK from continuing to expand and exert mind control.
45,385 BCE: - The Northern Revolution starts.
44,800 BCE: - The RoK destroys a huge number of peacekeepers which freed trillions of individuals, all of which inevitably turned against the PUK and destroyed even more peacekeepers.
32,220 BCE: - The Northern Revolution ends.
15,470 BCE: - The Qulurim Domains is created.
59,330 CE: - The first generational ships hailing from the Moras Cluster settle on a planet in the Outer Aghori Arm.
97,489 CE: - The Tears of Vigimir forms.

Major Worlds

PlanetIcon.png Ripal PlanetIcon.png
PlanetIcon.png Kembar PlanetIcon.png
PlanetIcon.png Mirin PlanetIcon.png
Inner Aghori Arm, People's Union of Kuruva
Northern Outer Core, Republic of Kembar
Outer Kael Arm, Intergalactic Telusian Commune
est. 5.7 billion
141 billion 88 billion
Unique Attributes: Very secretive
PlanetIcon.png Meitura PlanetIcon.png
PlanetIcon.png Velorus PlanetIcon.png
Outer Aghori Arm, Meithar Union
Northern Hinterlands, Qulurim Domains
Population 50.5 billion 74.8 billion
Unique Attributes: Near a protoplanetary nebula

Globular Clusters

Nyrin is orbited by only 3 globular clusters, quite a small number but not surprising given the small size of this galaxy.

Diosuri Cluster

The Diosuri Cluster is the closest of the 3 clusters to Nyrin. Currently, it is located slightly above the outer Aghori Arm, about 7,500 light years from the centre. The Diosuri Cluster is about 25 light years across, and contains about 30,000 stars. The cluster is quite metal poor, with an average metallicity of about 2.1% the metallicity☉. Other than a few colonies on the outskirts of the cluster, it hasn't been explored very much, mostly because it's so resource poor. The cluster surrounds an intermediate mass black hole with a mass of about 2,000 solar masses, quite small for a black hole of this type.

Moras Cluster

The Moras Cluster is the second of the 3 globular clusters orbiting Nyrin, currently suspended above the Northern Hinterlands, in the halo, about 10,000 light years from the centre. The Moras cluster measures about 108 light years across and contains about 900,000 stars. The cluster is anomalous due to how metal rich it is, with a concentration of metals of about 0.19 times the metallicity☉. It surrounds an intermediate mass black hole with a mass of about 8,500 solar masses.

Anomalous Signal

According to ancient PUK documents, about 15 million years ago, strange signals were detected originating from the cluster, which resembled a call for help from the death of a star. About 15,000 years later, a planetary nebula was seen in the cluster, and the signal had vanished. Since then the nebula has dissipated. However, about 500,000 years ago, a similar signal was detected emanating from the same region of space, and probes were sent to investigate.

It turns out that there was a civilisation in the cluster, which got destroyed by the death of its parent star, but not quite. Some had left and were on generational ships which were venturing out of the cluster and towards the Aghori Arm. In 60,000 CE, they arrived and established a new nation there around a habitable planet.

Arogel Cluster

The Arogel Cluster is by far the furthest of the 3 globular clusters orbiting Nyrin. Located 45,000 light years from Eyerin, barely keeping its orbit stable, it is unclear if this cluster is really a globular cluster. The cluster is huge, at about 350 light years across, but only contains about 430,000 stars, hence it is very dim. Huge amounts of dark matter have been detected. It is extremely metal-poor, with an average metallicity of merely 1/300 that of metallicity☉. The current models predict that this is not really a globular cluster, but a tiny fossil galaxy, a remnant of a galaxy which failed to grow large enough to be considered one early on. This cluster has been explored by probes, but there are currently no colonies in there. The entire thing orbits a black hole with a mass of about 20,000 solar masses.

Celestial bodies and systems

Notable/Major stars/star-like bodies

  • Eyerin - Eyerin is the central black hole of the galaxy. Eyerin currently has one of the smallest black hole accretion disks of any supermassive black hole. In the past, the disk was larger, but when the PUK arrived, it used much of the accretion disk and surrounding material to build a large peacekeeper, which controls the populations around the black hole and in the inner core. Only 11 stars are known to orbit Eyerin with separations under 1 light year, most of which are white dwarfs or neutron stars.
  • Crusima - Crusima is the black hole and the remains of the Wolf-Rayet star which exploded in 48,995 BCE and started what would end in the creation of the Republic of Kembar. After tens of thousands of years of obscurity, in 90862 CE the republic conducted a search to find the black hole which caused the first peacekeeper event. After about 10 years, the position was found after reconstructing past PUK documents, both diplomatic and science-related. After about 1000 years of searching, the black hole was found, and the population slowly started to build up. Currently, the area around the black hole is very busy, there are many megastructures around the object, including lots of habitats near the black hole.
  • Chael'Arga-Okon - So-called the most dangerous star in Nyrin. It's a trinary consisting of two hot, luminous Wolf-Rayet stars and an extremely bright, unstable Luminous Blue Variable located in a star-forming region in the northern hinterlands, under the control of the Qulurim Domains, a federation of autocracies with extremist politics. Chael'Arga-Okon as a system doesn't have much left to live, and will decompose in approximately 280,000 years. As tensions around the Qulurim Domains are rapidly increasing, the Domains have considered using the star as a bomb and make it go supernova quickly in a nearby nation if tensions rise quickly enough, and although the domains are small, they have heavily invested in their military and so they have the technology to do this.

Notable/Major clusters and nebulae

  • Kuruva Cluster - A giant open cluster, containing aging, low-mass stars as well as young, bright high-mass stars. The Kuruva Cluster was the only surviving open cluster after the end of star formation in the Nyrin Galaxy, about 12 billion years ago. It is the origin of the People's Union of Kuruva, currently the most powerful nation in the galaxy, but that may soon change.
  • Blossom Nebula - Being a starburst galaxy, Nyrin will be in abundance of large nebulae, such as the Blossom Nebula. Located in the inner Aghori Arm, this nebula the largest and brightest. It is especially significant as it houses the Kuruva Cluster, one of the most important structures in Nyrin and the home of the People's Union of Kuruva, as well as being home to 7 Wolf-Rayet stars, 2 luminous blue variables, 2 yellow hypergiants, and countless other bright, hot stars, most of which are sadly obscured by a lot of dust, typical of giant nebulae like this one.
  • The Tears of Vigimir - This is a very young protoplanetary nebula surrounding the RV Tauri variable, Vigimir. The protoplanetary nebula was once thought to threaten the existence of one of the most important planets in the Nyrin Galaxy, Meitura, because Meitura's parent star, Sepitome, is located in a binary with Vigimir, but further studies concluded that the nebula is completely harmless, and it is being mined extensively by several megacorporations in the Meithar Union. The nebula appears in Meitura's sky as a faint blue patch surrounded by red arcs, and is about 2500 years old.

Notable regions

  • The Fields of Poverty - A large geopolitical area in the outer core and southern hinterlands where there have been many planets where life has taken hold over the last few hundred million years. Evolution was sped up and many intelligent species emerged, and they all slowly gained a foothold in the stars. As Nyrin has a very low metallicity, there were not many resources available to these nascent nations, and they were forced to fight over small amounts of precious metals. Currently life is hard in these areas and conflict and war is ubiquitous, but other wealthier nations have tried to help, notably forming the Hinterlands Coalition, an organisation designed to help nations in need and distribute resources.

Major Nations

Name & Flag Location Capital Species Government Number of stars under control Civilization Type
PUK Flag.png
People's Union of Kuruva
Core, Inner Aghori Arm PlanetIcon.pngRipal TBA Totalitarian Oligarchy 318 million Type 2.85
RoK Flag.png
Republic of Kembar
Northern Outer Core PlanetIcon.pngKembar TBA Democratic Republic 32 million Type 2.75
Meithar Union
Outer Aghori Arm PlanetIcon.pngMeitura TBA Socialist Democratic Republic 19 million Type 2.73
Qulurim Domains
Northern Hinterlands PlanetIcon.pngVelorus TBA Federation of autocracies 2.8 million Type 2.64
Southern Hinterlands PlanetIcon.pngLommuma TBA Autocracy 7.9 million Type 2.69

Notable Anomalies

The Nyrin Galaxy is home to several exceptionally strange phenomena, as well as some general anomalies found in some other galaxies as well. Some of these anomalies have only been documented in Nyrin, due to the galaxy spending much of its time alone.


Nyrin holds a relatively high concentration of wormholes, but not as much as some other galaxies, like Florathel. About 14,000 wormholes have been documented in the galaxy so far, most of which reside in the core and inner arms. Most of these wormholes lead to other places in the galaxy, although some will lead to other galaxies, or in some unfortunate cases, intergalactic space.

Muonium nebula.png

Muonium Nebulae

Muonium nebulae are emission nebulae (H II regions) in the Nyrin Galaxy that contain incredibly large quantities of muonium (atoms where electrons are replaced by muons), in some, quantities as high as 1 muonium atom per every 30 atoms. Muonium atoms are slightly heavier than their normal counterparts, and could cause some weird effects when they are mixed in the ISM. Ionised muonic hydrogen looks rather different to regular hydrogen, changing colour quickly as it gets hotter, a property unique to itself. Therefore, some muonium nebulae look very funky, containing many different colours.

Nyrin is the only galaxy where muonium can exist for long periods of time, and it is unknown why this is. Where the muonium originally comes from is also not very much known, but it is likely related in some way to Eyerin.

Muonium Stars

Muonium stars are stars which are composed of a significant percentage of muonium, usually muonic hydrogen. They are much more subtle anomalies than muonium nebulae, as the muonium doesn't change their appearance much, if at all. Most of the time they look the same as regular stars, but the stars with the most muonium may look slightly more saturated than their normal counterparts. The added mass in a muonium atom compared to a hydrogen atom will mean that a muonium star with a certain amount of atoms will be slightly heavier than a regular star with the same amount of atoms.

Muonium concentrations in these stars are quite low, and the criteria for muonium star classification states that the concentration of muonium in these stars must be between 100 times the concentration in the galaxy's interstellar medium, and up to 10% of the star. Only about 20,000 muonium stars have been catalogued in the galaxy.