The U.S.S. ÜberEnterprise (NCC-1701-∞) is a Mega-Federation exploration vessel launched in A.D. 12265 (the ten thousand year anniversary of James T. Kirk's first mission as captain of the original USS Enterprise (NCC-1701). The vessel is a spherical liquid-metal starship 250 km in diameter, which can separate into larger copies of the earlier starships named Enterprise for exploration purposes.
The ÜberEnterprise is equipped with advanced warp engines capable of speeds of at least Warp 1000. It is also equipped with a blinkporter, which can transport the user at the speed of thought. (ST short story: "Our Million-Year Mission")