One of NASA's many little-known continuing missions, and certainly one of their most successful, is the Voyager mission. Launched in 1977, the Voyager mission is now in its 25th year and has vastly increased mankind's knowledge of space and the universe. It continues doing so, both spacecraft still communicating with NASA engineers on a daily basis as part of the ongoing VIM (Voyager Interstellar Mission).

Voyager 1 is now the most distant human-created object in the universe at roughly 85 AU (Astronomical Unit: the distance from the Earth to the Sun), and Voyager 2 is still the only spacecraft ever to visit Neptune or Uranus. Their extreme distance from the Sun and nearly 20 more years of operable service prompted NASA to extend their original mission in 1989, when Voyager 2 completed the original mission with its Neptune encounter.

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