BORG STARSHIP - Borg sphere

The sphere ship was first seen in the movie Star Trek: First Contact, where it was stored within a Borg cube ship under a large slide-away hatch and used as an escape vessel upon the destruction of the cube. This particular sphere was seen to be capable of time travel. It is unknown if other sphere ships are commonly carried aboard cubes or commonly possess time travel capabilities. It was later found in the Arctic in the episode Regeneration of ST:ENT. They are equipped with reactive armour. These vessels carry a complement of 10,000 borg drones. Borg spheres were also seen in several episodes of Star Trek: Voyager. During the episode "Unimatrix Zero, Part 2", a Borg Sphere is shown firing both phasers and disruptors.

In the Star Trek: Armada game series, they are depicted as light cruisers that have the ability to rapidly regenerate their shields for a short period of time, while in the Voyager episode Dark Frontier Seven of Nine refers to one as a scout ship.