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The United Earth Space Probe Agency is an organisation within the Federation tasked with deep-space exploration. While initially independent, it was merged with Starfleet Command sometime before 2143[1].


UESPA was founded in the early 21st century, between 2032[2] and 2069. Barely six years after Cochrane's first warp flight the agency was sending warp-capable probes out into deep space[3].

By the 22nd century UESPA and Starfleet combined their efforts[4], with UESPA personnel assisting in the design of Starfleet vessels[5][6]. The last known UESPA-operated vessel was VK Velikan, launched in 2160[7].

By the 23rd century, Starfleet vessels performed certain mission under UESPA authority[8]. The agency oversaw civilian traffic within the Federation[9].

Current status

It is unknown whether UESPA still operates in the 24th century and beyond.


  1. ENT "First Flight"
  2. VOY "One Small Step
  3. VOY "Friendship One"
  4. ENT "Demons"
  5. ENT "Broken Bow"
  6. Star Trek: Generations
  7. TNG "Up The Long Ladder"
  8. TOS "Tomorrow Is Yesterday"
  9. TOS "Charlie X"