The Ryyk Nebula was a nebula located near the planet Myrkr in the Trans-Vulta sector of the Mid Rim, somewhere along the space lanes between the planets Serroco and Telerath. In 3963 BBY, during the Mandalorian Wars between the Galactic Republic and the Mandalorian warrior clans, Admiral Saul Karath attempted to reach the Ryyk Nebula after retreating from the Mandalorian destruction of Serroco and link his forces up with the Tremendous battle group in the area. However, Karath never reached his destination, as his flagship, the Courageous, was boarded and destroyed.