The Vade Star Cluster is a small open star cluster located in the Mid Arm of the Ambrosia Galaxy. It served as the birthplace of the Vade, an ancient artificial intelligent species from 2,406,006,000 BCE to 2,406,000,000 BCE. As well as other non-intelligent organic species.
At first glance, the Vade Star Cluster could be mistaken as your average, small open star cluster housed within any galaxy. It houses around one hundred and eighty stars all within a tight knit orbit with each other. However, upon further inspection one will find that each and every world within it is a Selena, devoid of both life and atmosphere with only two *known* exceptions.
This is due to the actions of the Etymology, an ancient late type three intragalactic and early intergalactic civilization that held control of the whole of the Ambrosia Galaxy. In 2,406,100,000 BCE the Etymology would use orbital satellites to artificially heat the planets and moons of the star cluster to around 60000°C, destroying the atmospheres of them and leaving them lifeless rocks. Ironically, the Etymology's own respective destroyer, the C.Y.R.E.X would use the same method across their own worlds.
To understand why they did this we need to go back to the creation of: "The Vade." An artificial intelligent species created by the Etymology themselves. The Vade Star Cluster would be used as a miniature controlled "galaxy" for their new creations to colonize as one of their many experiments to created artificial species. Once it was discovered that this new species of theirs had the inborn ability to control thousands of other organics with a strange unknown telepathic signal, they feared that it would be the end of them. Thus, they decided to terminate all of them, in the processes destroying all worlds within the star cluster.
Once the Ambrosia Alliance of United Systems discovered the star cluster in 10,560 CE, they were unaware of why the star cluster was seemingly devoid of any diversity in its planets and moons. And thus they remained extremely puzzled as to why it had this strange uniformity in its star systems. That was until they discovered the last remaining Vade in existence, who informed them of their tragic beginning and end. Afterwards the Vade Star Cluster would become an area off limits to any who would enter it by law, as a show of respect to all those who had perished in that faithful moment. This practice has been widely criticized however due to the vast amount of habitable cities there.
The Vade Star Cluster's geography is that of your average open star cluster with only a relative few stars in gravitational resonance of each other. Near the center of the star cluster is where the majority of stars can be found, each clumped together in a semi-loose cluster, while the outer edges of the main cluster is made up of stars orbiting it in loose and wild orbits.
And as previously stated, all planets and moons in the star system are lifeless Selena worlds varying in temperature depending on their respective position in their home star systems.
Before their destruction, the Vade had colonized all stars within their home star cluster, constructing massive cities on all planets and moons that could house them in the short time span of six thousand standard years. These cities were made out of crystalline material similar to quartz crystal in appearance and they have remained on the various worlds they inhabit, completely intact. With several of them becoming Ecumenopolis'.
Other notable locations would be the various worlds that held non-intelligent organic life in both unicellular forms, and multi cellular ones. However much like the Vade, they were all destroyed.