Deuterium

Is a great source of fuel in starships and space stations.

Properties

Geology & Geography

A good source of deuterium is Class Y planets (aka demon class planets). These Planets are distinct by its hellish landscape, I.e. its name. This environment has a toxic atmosphere, deserts of sulphur and the surface temperatures exceeding five hundred Kelvin. In addition there are thermionic radiation discharges.
One of the biggest sources in the Shackleton Expanse is Planet: SE-487H19-CHARLIE-0065-I where it is farmed by the next planet in the system with over a 40% death rate to the workers.