Orbiting Geophysical Observatory

The Orbiting Geophysical Observatory, or OGO, was a 20th century series of artificial satellites used by NASA for studying the Earth's magnetosphere.

A black-and-white drawing of the satellite was stored in the USS Enterprise (NCC-1701) library computer. This drawing was retrieved by the Talosians when they accessed the starship's computers in 2254. 

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Programme Orbiting Geophysical Observatory