Calyx is the planet/world the game is set in.
This is what's known at the moment
Calyx is a rogue planet without a star. This makes the surface as cold as space so astronauts must dig below the surface to build a base.
Databank Entry[]
>CALYX
Calyx was a rogue planet detected in 2072 by astronomers at Auyuittuq National University via the HEAVENEYE Orbital Telescope. Speculated to be the same object as OGLE-2016-BLG-1928 (initially detected by microlensing in 2020) due to a similar, earthlike Jovian mass and theoretical trajectory, the planet was renamed for ease of reference by the International Astronomical Union in collaboration with the newly-formed ANXECAL.
Statistics:
Discovered by - Peter Aglukkaq, Sharon Patsauq, George Sikkuark
Discovery date - 29 March 2072
Mean Radius - 27,622 ± 19 km
Mass - 1.2 mj
ARTICLE EXCERPT: 'A NEW WORLD IS DISCOVERED. IT WON'T LAST.'
astronomerchronicle.hvneye/Jan-73/feature/a-new-world
... Even more astonishing than the sudden detection of an unknown planet in our outer heliosphere was the calculation of its movement that soon followed. 'We're still trying to figure out a lot about it, but from what we know so far this is a true rogue planet, and it's moving very quickly - whether it was ejected from an existing planetary system or formed on its own, we aren't sure,' said Dr. Sharon Patsauq, one of the three-person discovery team at the Auyuittuq National University on Baffin Island. 'We'll only have a few decades at most to study it remotely, and this is the first time we've ever had one close to do better than far-infared observation. What we need to do urgently is [...]