Retcon article
(covers information that was retroactively changed)
An omnidirectional antenna was a piece of advanced communications technology aboard both NASA's Mariner 2 and Ranger 5 space probes when they were launched in the mid-20th century.
Schematics of the Mariner 2 and Ranger 5 spacecraft depicting the location of the omnidirectional antenna were stored in the USS Enterprise's library computer database. This database was accessed by the Talosians in 2254. (TOS: "The Cage")
The schematics of the Mariner 2 and Ranger 5 spacecraft were from the archives of the National Aeronautics and Space Administration - Jet Propulsion Laboratory.