Launched in to 1960s and 1970s, NASA's Pioneer spacecraft made the first detailed observations of Saturn and Jupiter.

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Pioneer 10 Spacecraft Sends Last Signal
The last, very week signal was in January, a subsequent attempt at contact failed. (February 25, 2003)
Pioneer 10 Makes Contact
One of the most distant probes ever launched into space has contacted Earth to say all is well. [BBC News] (March 04, 2001)

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January 2, 2007 at 18:00:34 UTC
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