A planet orbiting the star Monac, whose Dominion shipyards Worf and General Martok destroyed in 2375 to win Jadzia Dax a place in Sto-vo-kor.
Monac IV is the location of a large shipyard serving the Dominion fleet. It features in Image in the Sand and Shadows and Symbols, the two episodes that open Deep Space Nine's final season.
Worf grieves that Jadzia Dax, murdered rather than killed in combat, may be barred from the Klingon afterlife. Martok offers him the remedy of a great victory dedicated to her and proposes a raid on Monac IV. Bashir, O'Brien and Quark insist on coming along aboard the IKS Rotarran.
The plan is to provoke a flare from the Monac sun large enough to engulf the yards. The first attempts fail and Jem'Hadar ships close in, but the Rotarran finally triggers the eruption and the shipyards are consumed.