Mayuri System

The Mayuri system is home to a single inhabitable planet, and a partially hospitable moon. 
There are 3 planets in the system, the one closest to the yellow earth-like star, is Tungava, a crusty small rock - barren of life and not hospitable. The second planet is Rallis, which is an Earth-like colony world which has a barren moon named Rallis Minor, and the third is a gas giant Mayuri Major with a hospitable moon, Mayuri Minor. 
The Mayuri system has it's own independent government ruled from Rallis City on Rallis. 
Rallis is the most interesting planet in the Mayuri system. Rallis has a moon which is barren and inhospitable, referred to as Rallis Minor. Rallis itself is colonized and has a population in the millions, slowly crawling towards reaching it's first billion. It's capital is Rallis City. 
There is an orbital station around Rallis, Mayuri Major and Mayuri Minor. They are named Rallis Orbital Station, Mayuri Major Mining Station and Mayuri Minor Orbital Station. 
Tungava used to have a moon, or so the asteroid field surrounding the planet suggests. 
Mayuri Major is a hydrogen gas giant, and its orbiting moon is a very cold world with a single small colony on it, mostly consisting of gas miners and those that support the operation.