Memory Beta, non-canon Star Trek Wiki

A friendly reminder regarding spoilers! At present the expanded Trek universe is in a period of major upheaval with the finale of Year Five, the Coda miniseries and the continuations of Discovery, Picard and Lower Decks; and the premieres of Prodigy and Strange New Worlds, the advent of new eras in Star Trek Online gaming, as well as other post-55th Anniversary publications. Therefore, please be courteous to other users who may not be aware of current developments by using the {{spoiler}}, {{spoilers}} or {{majorspoiler}} tags when adding new information from sources less than six months old. Also, please do not include details in the summary bar when editing pages and do not anticipate making additions relating to sources not yet in release. 'Thank You


Memory Beta, non-canon Star Trek Wiki

Emblem of United Earth Starfleet Command, including UESPA's name.

The United Earth Space Probe Agency (abbreviated UESPA) was a part of the United Earth government which was responsible for space exploration.[1]


UESPA evolved, in part, from the United Earth AeroNav Forces of the early 21st century. (TOS novel: Strangers from the Sky)

In 2067, UESPA launched the Friendship One probe toward the Delta Quadrant, as part of a series of unmanned exploration. (VOY episode: "Friendship One")

By the 2130s the United Earth Starfleet had taken UESPA's place as Earth's leading exploratory agency, but the two would continue to cooperate. (ENT episode: "First Flight")

UESPA personnel also aided in the construction of the Enterprise in 2150. (Star Trek: Enterprise)

After the founding of the Federation, UESPA became one of the five sub-commands of the new Federation Starfleet. UESPA was responsible for the exploratory division of the new Starfleet; the USS Enterprise was part of this division. (ENT - Rise of the Federation novel: A Choice of Futures)

UESPA continued to help control Starfleet vessels into the 2260s. James T. Kirk reported the destruction of the USS Antares to UESPA. (TOS episode: "Charlie X")

Later, Kirk informed John Christopher that UESPA was the USS Enterprise's operating authority. (TOS episode: "Tomorrow is Yesterday")

Wheeler Stinson studied accounts of the first days of UESPA. (DS9 novel: Ascendance)

Alternate realities[]

In one alternate timeline, the IKS Qu' was a UESPA vessel prior to its capture by Klingons. (TNG novel: Q & A)

In another alternate universe, UESPA became a purely military organization after several other powers established the Interstellar Coalition. They operated the UESS Enterprise in the 2260s. (Star Trek: Myriad Universes novel: A Less Perfect Union)

Template image.
This article is a stub relating to a group or organization. You can help our database by expanding on it.


UESPA is commonly represented by a golden arrowhead. [1]

External link[]

  • 1.0 1.1 ENT - Rise of the Federation novel: A Choice of Futures, Chapter 1, Page 14

    “Below the piping, next to the vertical zipper of the left-hand tunic pocket, was the gold arrowhead insignia of the United Earth Space Probe Agency, the government department that administered Earth’s Starfleet.”

  • Advertisement