Spatial sinkhole
A spatial sinkhole is one of a number of hazardous phenomena which can be encountered in chaotic space. A spatial sinkhole can produce a massive amount of graviton shear, increasing the pressure on a vessel's hull to a dangerous level.

Such a phenomenon was encountered by the crew of the  in 2375, when they became trapped in a region of chaotic space in the Delta Quadrant. The crew managed to narrowly avoid being destroyed by the phenomenon by moving away utilizing full thrusters. ()

See also
Subspace sinkhole

Astronomical phenomena