Sagittarius A*

Sagittarius A* (pronounced "A-star") was the supergiant quantum singularity at the center of the Milky Way Galaxy. It had an estimated mass of slightly over four million solar masses.

In 2384, the Machine, under the directive of the Body Electric, increased the mass of Abbadon, another massive blackhole, intending to collide it with Sagittarius A* to create a subspatial lens. The lens would have been capable of transmitting energy and information across the universe to the Body Electric's home galaxy, as well as becoming part of a work of art to represent its achievements for cosmic posterity. However, subspace throughout the entire galaxy would have been destroyed, and the resulting radiation wave would have killed all biological lifeforms. The crew of the USS Enterprise (NCC-1701-E) and the Traveler, Wesley Crusher, persuaded the Body Electric not to complete its task and instead create a longer lasting, non-destructive cosmic network.