This system houses a very rare phenomenon: five planets in complex orbits around each other. They have been named after the Five Good Emperors of the Roman Empire from ancient Earth: starting from the closest body, Nerva, Trajan, Hadrian, Antoninus and Marcus Aurelius.

It's worth noting that although the surface composition, size, mass and atmospheres of the planets are almost exactly the same, they still look quite different from each other. They all share atmospheres of pure nitrogen, and the second planet's atmosphere is thin enough that Commanders can land their ship there. Unfortunately, there is no life, not even bacteria. The other four bodies are close enough that all of them can be distinguished by the unaided eye.