Tachyon Dark was a musical album released in 2356 by the group Subspace Domain. It was the band's most popular album, still considered quintessential almost thirty years later. In addition to the title cut, Tachyon Dark included the songs "Capacity of Flux," "Signed, Anomalous," and the fan-favorite "Betelgeusean Rhapsody." According to Tim Sinclair, Jordan Dennis listened to Tachyon Dark "ad nauseam" while attending Starfleet Academy in the late 2350s. (Star Trek: Pendragon)