Located within the darkest depths of the Forbidden Zone in the Galaxy of Terror, Trisol is a desolate, desert world, in a trinary star system. It appears to orbit two main stars, with the third star orbiting farther out. The orbital period of the smallest star appears to be approximately one day. During "night" periods, when all three suns are not visible, the Trisolians begin glowing.
For some reason, the landing area on Trisol is miles from civilization, much to the chagrin and general irritation of visitors.