Jumbo

Jumbo is a Super-Earth planet. The gravity is 40% higher than Earth and non-breathable atmosphere. It used to have a breathable atmosphere in the distant past. Jumbo also used to have abundant surface life, now the native life there was limited mostly to microscopic organisms beneath the surface.

Something very bad had happened to Jumbo, and that was why the Thuranin Advanced Research Directorate (ARD) has a small facility there, basically a monitoring station. A long time ago, the Maxolhx had a colony on Jumbo, and during their war against the Rindhalu, the Maxolhx had used Elder devices as powerful weapons. That use of Elder devices for destructive purposes awakened the Sentinels that the Elders had left behind, and one thing the Sentinels did was cause Jumbo’s star to throw off a portion of its outer layer. Jumbo was scorched, much of its atmosphere blown away by the intense stellar fireball.

Trying to figure out how the Sentinels had used a star as a weapon, and investigating the nature of the Sentinels themselves, was the purpose of the Thuranin ARD station on Jumbo.