United Nations Aeronautics and Space Administration (or UNASA for short) was an Earth organisation.
Contact was made by Earth in 2019 with the Perseus Corporeal when UNASA probes detected two of the Corporeal's settlements on the moons of Jupiter and Saturn. (PROSE: The Ethereal)
In 2031, UNASA launched a spaceship headed for the Kuiper Belt. The Fourth Doctor and Sarah Jane Smith encountered it in 2040. (PROSE: Observer Effect)
Bernice Summerfield explored Planet 81 to find a lost 21st century UNASA Eagle probe. (PROSE: The Big Hunt)