Retcon article
(covers information that was retroactively changed)
(covers information that was retroactively changed)
OSO and OGO
The Orbiting Solar Observatory, or OSO, was a 20th century series of artificial satellites used by NASA for studying the physical properties of the Sun.
A black-and-white drawing of the satellite was stored in the USS Enterprise library computer. This drawing was retrieved by the Talosians when they accessed the starship's computers in 2254. (TOS: "The Cage")