Retrieving "Pioneer 11" from the archives

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1. Jupiter

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   Exploration History
   Jupiter has been a primary target since the beginning of robotic exploration beyond Mars. The first close-up encounter was achieved by Pioneer 10 in 1973, followed shortly by Pioneer 11. These missions provided the first detailed images of the atmosphere and confirmed the planet's intense radiation environment.
   The most comprehensive data sets were collected by the twin Voyager probes in 1979, which characterized the faint ring system and discovered the active volcanism on Io. Subsequent missions, including [Galileo](/…

2. Nasa Solar System Exploration/…

   Linked via "Pioneer 11"

   The Pioneer Program (1972–1973)
   The Pioneer 10 and Pioneer 11 missions were the first spacecraft to traverse the asteroid belt and achieve flybys of Jupiter. Their primary instrumentation was relatively basic, focusing on magnetic field measurements and capturing the first close-up images of the Jovian system. A notable finding was the discovery that the radiation belts around Jupiter were significantly more energetic than predicted, requiring the probes to switch to reduced operational modes shortly after their closest approach [^2].
   Pion…