Chi Zeral II

The only gas giant of the Chi Zeral System, and the largest planet in the system.

Chi Zeral II was most often used by the Saelian Coalition to gather hydrogen gas from, to fuse and create helium and a huge amount of energy in fusion reactors. As the only place in the system where the Saelians could do that easily (it would be possible to do on the ice giants but the hydrogen yield is much lower and they would need to filter it), it was a highly strategic location of the system unless fusion reactor fuel was to be shipped from other star systems, which in the worst case might not be energy positive. As such, the Coalition made sure to defend this planet well from orbital attacks, especially since they could not place ground defences on a gas giant. They established defence platforms in virtually all viable radii for orbits, and many in strategic locations so that at any one time, many weapons would be able to bear on the enemy at once while also covering a large number of directions to prevent the planet from being flanked. They also had some starship docks to launch military ships from if need be.

Despite the planets short distance from the parent star, and the implication that gas giants might retain a large amount of heat in the very thick atmosphere, Chi Zeral II is significantly colder than one might think, mostly because its parent star is a class K star which is quite dim. 

The planet has a primarily green appearance from orbit because of a significant makeup of a chemical that absorbs other frequencies while reflecting green light. 

There is also an asteroid ring around the planet which is often mined by the Coalition in order to obtain a wide range of various solid resources. Sometimes these are used in shipyards to repair ships, significantly cutting the costs of logistics (even further, compared to taking raw materials from other planets and bringing it to a shipyard orbiting Chi Zeral II). The asteroid belts can also make it much easier to hide defence platforms inside and launch surprise attacks against an enemy force.

Chi Zeral II also has a number of moons. These are also quite important to the worlds industry if the asteroids do not occur in sufficient quantity to sustain the large saelian industry. The moons can vary in makeup and environment quite a lot too. The largest moon has an atmosphere (these moons are roughly the size of a regular barren planet), takes up a mostly orange colour from orbit because of a significant iron content and as such has a significant mining operation. Another moon was very recently subject to a powerful cosmic event where another moon of a smaller size crashed into it. As such, the resultant planetoid is still recovering from this impact, making it extremely unsafe because of the immense geological activity. However, as much of the mantle is exposed, there were still huge mining efforts, and much of the planets power was generated through geothermal power plants. A particularly powerful tectonic blast at one point damaged much of the planet further, and destroyed almost all of the worlds industry in a single crippling disaster. The saelians never recolonized the world on such a large scale again, but some people probably still visit the planet for various reasons, possibly for scientific reasons or for tourism. One other moon contains an atmosphere very similar to that of its gas giant but with a much lower pressure because of the much reduced volume of the planet. Comprised mainly of iron, its powerful magnetosphere can obtain a very small portion of the atmosphere of the gas giant and retain that mass for itself. This also presents excellent scientific opportunities and is quite useful for some highly specific gas extraction operations. This world has an abnormally large amount of gas despite being so small.