Epsilon
Astronomical nomenclature
 Epsilon IX sector / Epsilon sector
 Epsilon IX station
 Epsilon IX station personnel
 Epsilon Pulsar Cluster 
 Epsilon 119, a star
 Epsilon Ashanti III
 Epsilon Canaris, a star
 Epsilon Canaris III, an inhabited planet
 Epsilon Ceti B, a star
 Epsilon Eridani, a star
 Epsilon Hydra VII, an inhabited planet
 Epsilon Hydrae, a star
 Epsilon IV, a planet
 Epsilon Indi / Epsilon Indi system
 Epsilon Indi II, an inhabited planet
 Epsilon Indi IV, an inhabited planet
 Epsilon Legato, a star
 Epsilon Monocerotis, a star system
 Epsilon Mynos system
 Epsilon Nel system
 Epsilon Municipality
 Epsilon Silar system
 Epsilon West IV, an inhabited planet
 Epsilon Wiltz IV, an inhabited planet
 Psi Epsilon III, an inhabited planet
 Psi Epsilon IV, an inhabited planet

Science and technology
 Epsilon Outposts
 Epsilon Outpost 1
 Epsilon Outpost 2
 Epsilon Outpost 3
 Epsilon Outpost 4
 Epsilon Outpost 5
 Epsilon Outpost 6
 Epsilon Outpost 7
 Epsilon Outpost 8
 Epsilon Outpost 9
 Epsilon Outpost 10
 Epsilon Outpost 11
 Epsilon radiation
 Spiroid epsilon wave

Terminology
 "Corridor H -6, Section 27 Epsilon", location of quarters on Deep Space 9
 "Epsilon 2", a comm frequency
 "Epsilon 7-9-3", Picard's command code
 "Kirk Epsilon", a Starfleet evasive maneuver
 "O'Brien-Epsilon-Alpha-Molly 5-7-9", O'Brien's command code

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