Ovod is a planet in the Ouranir Galaxy, in the outer parts of the galaxy. It was visited by the WDS Isvoy in 9952 CE. It orbits Eytinore's star, a star famed for its extreme eruptions as a BY Draconis variable.
Even if this system is 6.69 billion years old, Eytinore's star acts like it's 20 million years old, shooting out powerful flares and periodically stripping the atmospheres of most planets here. Ovod has a strong magnetic field, so it is protected. This is most likely due to a past alien civilisation whose creation, which malfunctioned, accidentally triggered the indirect cause of their extinction.
Ovod is a temperate E-class planet. It has one moon, Kanhos, an S-class moon on a very tight orbit. As a result, Ovod has very large tides which constantly erode more and more the surroundings of the small lakes of heavy-water which dot the planet.
The planet has small ice caps, and large deserts. Strange black spots have been detected around Ovod, and chemical analysis shows that it is in fact material heavy in uranium, mixed with decaying biomass. This is extremely weird, because you don't commonly find uranium together with dead lifeform material.
A study of the atmosphere of Ovod showed a disproportionate amount of heavy elements, such as various lanthanides, (specifically neodymium, samarium, europium, erbium and ytterbium), a stupendous overabundance of sulphur and an overabundance of various actinides. Again, strange, because this is obviously unexpected. As a result, it was classified as an anomaly until further notice.
In 14249 CE, a probe was launched from an unspecified planet to study Ovod in more detail. This probe discovered two new, previously unknown properties:
- Ovod's ocean was just as toxic as the other aspects of the strange planet: it was majorly composed of heavy water (~95%) - two deuterium atoms combined with an oxygen atom. On Earth , this percentage is about 0.0156%, much, much lower than on Ovod.
- Ovod's soil contained an inordinate amount of uranium and neptunium. This just shouldn't happen, especially with the neptunium.
It also discovered a small amount of these elements on Ovod's moon, Kanhos. Due to Kanhos being most likely dead, these elements on this moon were just completely unexpected. This motivated more research expeditions to this veritable planet.
In 16970 CE, a crew of 4 was sent to explore Ovod. They were tasked with investigating the surface around them and analyse them in every possible way. They needed to wear radiation-blocking equipment, though, due to Ovod's surface being radioactive.
A week after landing, one of the crew members recalls using a metal detector and finding a strange piece of seemingly advanced alien technology, buried in the ground. This is the first direct evidence of the civilisation that once existed on this planet. When the crew left Ovod, they had collected 7 pieces of technology, ranging from 1.6 centimetres to 12.5 centimetres in length. These seemed to comprise some sort of alien computer, although the details of these pieces are not very well described. This is because some of the elements of the pieces of technologies that had been radioactive (which would have been useful sometimes) had decayed into other elements, and due to the nuclear war, some non-radioactive elements became radioactive, effectively breaking the technology and blurring its use from outsiders because some of its atoms have changed type.
Soon after, more crewed expeditions were sent here, to find and study the enigmatic properties of this strange world and the secrets it hides beneath the radioactive sand that covers most of its surface. The findings included a large, still-working quantum computer, a large, fallen space telescope and an outdated map of Ovod's stellar neighbourhood. These, along with all other anomalies, all point to the fact that there was once an advanced civilisation on this planet, but has somehow died out.
Around a million years ago, a Kardashev type 2-2.5 civilisation existed on Ovod. It controlled most systems in a ~100 ly radius, but focused more on tinkering its own star system. Judging from fossil records, the constituents of the civilisation seemed to have 4 eyes and 2 legs. They had no clearly defined arms, but several appendages that resembled tentacles, which were mostly expendable as they could be regrown. According to historical and archaeological data, it seemed to be a thriving utopia, but soon it started to border another species' territory.
A small dispute over at least one star system (The Jirise system (RS8410-4-8-6593101-1428), and possibly others), through a sequence of events, ended in a major war between this civilisation and the other. The war involved many nuclear weapons, and heavy nuclear bombings of both Ovod and the rivalling civilisation's homeworld, which nearly led to the extinction of both species. The rivalling species had been extinct, and the one originating from Ovod was slowly shrinking in size. So they decided to try and starlift Eytinore's star to build a large Dyson Sphere to surround it. The plan was to take all of its energy and construct a large structure for the dying civilisation to use and experience VR and live in a VR world. However, the plan sadly went dastardly wrong, as the equipment they used was just radioactive enough to set off a chain reaction. The war also ended in Jirise, once a G-type main sequence star, losing quite some mass and becoming a white dwarf, therefore sterilising all its planets.
Dyson sphere incident
A piece of energy-collecting device had a radioactive atom. It fired a neutron into a chamber full of radioactive materials, which set off the reaction, sort of like a nuclear bomb. It completely destabilised a significant fraction of the Dyson sphere, and set forth multiple similar reactions that took place around the entire sphere. A significant part of the outer solar system was annihilated.
As the molten, broken Dyson sphere fell into Eytinore's star, it had the effect of increasing fusion rates, making Eytinore's star effectively look much younger than it really is. But this didn't completely wipe out the civilisation. This explains why it behaves like a young pre-main sequence star and a powerful BY Draconis variable.
Complete demise by a very powerful flare
A few decades after the Dyson sphere fell into Eytinore's star, it released a huge flare that made it around 1500 times brighter than it normally is. It momentarily fried the planet and heated it up to around 1000 degrees Celsius, quickly destroying all life on the poor planet. All oceans evaporated, all ice caps melted and then subsequently evaporated, and the entire planet became a sea of semi-molten rock.
Ovod cooled down slowly.
Tectonic plate boundaries slightly changed, and oceans, albeit this time much more poisonous, slowly pooled on the low-lying lands. Apart from this, Ovod was still unrecognisable. The atmosphere was quite thick, dominated by carbon dioxide, and as stormy as one could imagine. Extreme lightning, nearly comparable to those found in J-class or I-class worlds, was commonplace. Volcanoes were everywhere, spewing lava, and the water that had pooled in lakes kept on evaporating, raining down somewhere else, and the cycle repeated. In short, it was very inhospitable, similar to Venus (before terraforming) but wet.
Several thousand years after the powerful flare, Ovod's carbon dioxide atmosphere strangely disappeared, out of nowhere. But it did pave the way for a more habitable and hospitable planet. Volcanic activity calmed down, oceans expanded, and for the first time in a while, ice caps came back onto the planet.
6.691 billion years ago, Ovod formed. It was a small planetesimal, insignificant among others, trawling through the giant disk of dust surrounding Eytinore's star. Over time, more and more planetesimals were removed from the system, allowing Ovod to grow to around 1.4 earth masses. It was a very very hot place, with lava everywhere on the surface. Kanhos forms around Ovod, initially in an even closer orbit than it is in today.
Soon, it would cool down and form a conventional E-class world, with much more water than it currently has. It would develop life, originally unicellular, in a hydrothermal vent deep below sea level.
Around 800 million years ago, multicellular life started to evolve, but the progress was slow. But some 200 million years later, an event akin to the Cambrian Explosion on Earth gave evolution a big boost, and things began to evolve very quickly.
30 million years ago, a large asteroid struck Ovod, wiping out 93% of all species. This allowed the species that would one day dominate the planet to start evolving, and 10 million years ago, they achieved sapience. Soon, they learnt how to use tools, make a primitive society and discover the use of fire. Around 1.2 million years ago, they finally invented spaceflight, and soon colonised the entire system, setting up bases on the most remote of worlds orbiting Eytinore's star. Soon, the civilisation began to spread to other star systems.
But due to a new ideology, similar to a sort of pessimistic nihilism, quickly gaining popularity(according to archaeological records), the civilisation could not travel more than ~50 lightyears from Ovod. For thousands of years, it remained this way, locked in a sort of stalemate between exploration and this strange ideology. Soon though, exploration would win the stalemate and it continued to expand. One day, it came to a system that was already occupied by another civilisation, which through a series of events would lead to the demise of this civilisation and the sterilisation of Ovod. It would be later rediscovered by a sapient civilisation on a giant ship equipped with wormhole drives, and become an important site for civilisation development and demise.
As Eytinore's star begins to die (8 billion years in the future), Ovod will heat up, causing all ice caps to melt, and a runaway greenhouse effect will slowly grip the planet. Oceans evaporate, lava becomes more and more commonplace around the globe, and carbon dioxide will re-enter the atmosphere. It will soon become nearly as hot as Oblivio, with an extensive cloud cover and large oceans of lava, which will replace the ones of water we see today. Soon after, temperatures are so high that the atmosphere entirely evaporates, leaving a barren, scorched core behind.
11-12 billion years in the future, Ovod will be consumed by the dying Eytinore's star, now a pulsating Asymptotic giant branch star, or AGB star. If it survives at all, it will spiral in towards the core of the star, and when the outer layers are thrown off, will find itself orbiting the dead remnant of Eytinore's star, which will gradually shrink and cool into a white dwarf. Ovod will migrate closer and closer, and possibly be ripped apart from the star's tidal forces, and will disintegrate into a ring.
If Ovod does survive being around the white dwarf, at some point in time, maybe around a billion years after the demise of Eytinore's star, it will have the chance to become habitable again. This is of course if some civilisation decides to terraform Ovod. And if Ovod does not get terraformed, it will cool, along with Eytinore's star.
A few hundred trillion years into the future, the star will cool so much it will become a black dwarf. Ovod could have disintegrated by now, as its orbit will decay and shrink due to gravitational waves. This will happen at some point, before proton decay, which will evaporate all matter in the universe, around 1e+33 years in the future.
Today, Ovod is still a rich archaeological site in the Ouranir Galaxy, even if it is a dangerous place to be. It receives periodic excavations for more and more artefacts from this mysterious species, that ruined its entire star system to try and survive in the cosmos, trying as many options as it could. It has a few stations in orbit, to monitor it constantly, just in case something unexpected happens again. There are no plans for Ovod to be used as any kind of settlement more than it is used as a subject of research.