Tau Alpha C

Tau Alpha C was the home of the humanoid species that The Traveler belonged to. At warp 9.5, it would take 123 days to travel from Starbase 133 to Tau Alpha C. A subspace message would take days to travel back and forth between both locations. 

The inhabitants of Tau Alpha C were a race of shapeshifters capable of existing outside of time and dimensions, and had very little interest in associating with other more primitive species before the 2360s, when they became aware of Humans like Wesley Crusher. The Traveler, a native, visited the USS Enterprise (NCC-1701-D) crew in 2364, and he and Wesley Crusher worked together. 

In an alternate universe created after Doctor Beverly Crusher became trapped within a warp bubble, Wesley tried to contact Tau Alpha C for assistance when individuals began disappearing from the Enterprise'', with only Dr. Crusher noticing. Ultimately, the entire universe, including Tau Alpha C, disappeared.''

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