Titan

Titan was the largest moon of Saturn, the sixth planet in the Sol system. It is also the second largest satellite in the Sol system, and the only such body to have a dense atmosphere, and is larger than some planetary bodies in the solar system.

By the mid-22nd century, the Terran Federation had established several domed settlements, including Ouranos Landing. This colony became a safe haven for aliens during the Star War.

The colony continued into the 27th century, by which time the atmosphere had been modified to class M status. At the time, the colonists began a geothermal heating project, tapping into the interior heat of the moon. It was hoped that before too long the atmosphere of Titan would be warmed to the point that the domes would no longer be needed.