An unusually dense globular star cluster that the Enterprise-D was charting in 2369 when members of its crew began to be abducted in their sleep.
The Amargosa Diaspora is a tightly packed globular cluster containing an enormous number of stars. It is the setting of the sixth-season Next Generation episode Schisms.
In 2369 the Enterprise-D is assigned to map the cluster, a slow task. To speed it up, La Forge channels warp power through the main deflector to boost the sensors. Around the same time Riker finds himself exhausted every morning, and he, Worf, La Forge and a civilian woman all react with dread to ordinary objects. In the holodeck they piece together a shared memory of a dark room and an examination table.
La Forge's modification has drawn the attention of solanogen-based beings from a deep subspace domain, who open a pocket into a cargo bay and take crew for experiments. Riker stays awake, is taken, and returns with a missing crew member while the rupture is closed.