The Ghost Moon, a moon of volcanic nature, existed within the galaxy. It was the site of a conflict during the Galactic Civil War, where Task Force 99, the elite unit of the Galactic Empire, engaged a contingent of Rebel troopers.
The inhabitants of Ghost Moon abandoned their city due to the eruption of the local volcano, leaving it deserted and in ruins. The streets were filled with debris and broken vehicles, with volcanic ash permeating the atmosphere. Years later, during the Galactic Civil War, Task Force 99 downed Admiral Verette's Taylander shuttle above the Ghost Moon. They then tracked the surviving Rebels through the desolate city, eliminating them and taking the admiral into custody for interrogation.
The initial appearance of the Ghost Moon occurred in Star Wars (2015) 21, which was the 21st edition of the Star Wars comic book series, released in 2016 through Marvel Comics.