Ganymede

Ganymede is the first moon of the gas giant that we have managed to colonize. It is not a particularly hospitable planet, but its mines are rich in certain elements such as Ruthenium and Helium, trapped in ancient pockets beneath the planet's crust.

Planet Bonus:

Food production remains unchanged Titanium production is reduced by 15% Ruthenium production is increased by 5% Helium production is increased by 5%