- For other uses, see Io.
Io was a moon in orbit of the planet Jupiter, the fifth planet of the Sol star system, located in Sector 001 of the galaxy's Alpha and Beta Quadrants. (ST reference: Star Charts)
Features
Like the innermost large moon of Cherela, the tidal forces of the Jovian's gravity kneaded the moon's crust, turning Io into a volcanic hell. The intense magnetosphere conducted with the erupting gases, creating a plasma torus which the moon then plowed through. (TOS novel: The Face of the Unknown)
History
During the 2020s, the Europa Mission discovered a microorganism on Io that would later be instrumental in undoing the effects of climate change on Earth. (PIC episode: "Farewell")
In 2269, the innermost large moon of Cherela, the elected homeworld of the First Federation's Web of Worlds, was reminiscent of Io. (TOS novel: The Face of the Unknown)

In 2369, the USS Progress was reassigned to the Earth-Io run. (SCE - What's Past eBook: Progress)
In the 2370s, Starfleet named the Luna-class starships after moons in the Sol system. The USS Io (NCC-80105), launched in 2379, was named for Jupiter's moon Io. The Amalthea, Callisto, Ganymede and Europa were also named after Jupiter's moons. (TTN novel: Taking Wing Luna Class Concept Notes)

In 2411, Jupiter Station was positioned between Jupiter and Io during an attack by Terran Empire forces led by Captain Sylvia Tilly of the ISS Enterprise and Captain Kuumaarke of the ISS Reskava. (STO - Terran Gambit mission: "Iuppiter Iratus")
They betrayed Marshal Kathryn Janeway of the ISS Voyager, who had assembled her task force high above Io for a raid on Jupiter Station. (STO - Terran Gambit mission: "Red Shift")
Kelvin timeline
In the Kelvin timeline, Section 31 constructed the USS Vengeance in the Io Facility in orbit of the moon between 2258 and 2259 following the Destruction of Vulcan. When the USS Vanguard found the derelict SS Botany Bay floating in space, it towed the craft to the Io Facility where Khan Noonien Singh was conscripted into service as "John Harriman", operating out of the facility before he recalled his true identity. In 2259, Lieutenant Commander Montgomery Scott infiltrated the drydock shortly before the launch of the Vengeance, having learnt the coordinates indirectly from Khan. (TOS movie: Star Trek Into Darkness & TOS - Khan comics: "Issue 4", "Issue 5")
Appendices
Connections
References
- ST reference: Star Charts
- TOS movie: Star Trek Into Darkness
- STO - Terran Gambit mission: "Iuppiter Iratus"
- STO - Terran Gambit mission: "Red Shift"
- ST video game: Klingon Academy
- ST video game: Infinite
External links
- Io article at Memory Alpha, the wiki for canon Star Trek.
- Io article at Wikipedia, the free encyclopedia.