Bre'el IV moon
From Memory Alpha, the free Star Trek reference.
The Bre'el IV moon was a moon in orbit of Bre'el IV in the Bre'el system.
In 2366, the moon began to fall out of orbit, threatening the planet. The USS Enterprise-D made several attempts to return the moon to its proper orbit, but was unable to do so. Disaster was ultimately averted by Q when he returned the moon to its proper placement. (TNG: "Deja Q")
