It was located between Coachelle and Ota, on the border of Mytaranor sector and Terr'skiar sector. The nebula was the remnant of a exploded star in the Kyyr system, which severed the Ootmian Pabol trade route. At the center of the nebula was the Thornhedge Pulsar.
The nebula was used in the Huttese compliment, "Your presence is as daunting as the Thornhedge Nebula".
- Underworld: The Yavin Vassilika (First mentioned)