The Abyss Nebula.
The Abyss Nebula (Stellar Catalog Beta 14-CN 625) is a large nebular gas cloud near an outer edge of the galaxy.
History and specifics[]
It was first surveyed in the year 2234 by the USS Byrd, and is composed primarily of interstellar dust. It was registered as "Stellar Catalog Beta 14-CN 625". It was standard information in the library computer of starships in the late 23rd century.
Some of the more important regions of the nebula are known as Alpha CN625, Beta CN625, and Gamma CN625. (ST video game: Starfleet Academy: Strategic Command)