Grannus is a planet scarred with tectonic activity and surfaces crisscrossed with rivers of lava. The Caelus Cartel made attempts to strip the planet of its rare metals; but due to the tectonic activities on the surface these attempts were of little success, forcing the cartel to focus on gas mining on Perune in the system.
The planet revolves around Caelus in an atypical horseshoe orbit with Huracan. Due to its potential proximity with its brother at the end of each full orbit, a rare occurrence nicknamed the “Convergence” happens almost every four years. The planets will share their atmosphere for (less than) 3 days. This leads to an increase in already unstable tectonics. Jets of lava may or may not catapult from - near, if not onto - one planet and another. This event prohibits any major settlement or mining operation from being a durable investment for any occupying force or organization.