did the spacecraft have any encounter with other planet?
Yes, it encounter with the planet Jupiter
Pioneer 11
"Pioneer 11" flew past Jupiter in November and December 1974. During its closest approach, on December 2, it passed above the cloud tops. The probe obtained detailed images of the Great Red Spot, transmitted the first images of the immense polar regions, and determined the mass of Jupiter's moon Callisto. Using the gravitational pull of Jupiter, a gravity assist was used to alter the trajectory of the probe towards Saturn and gain velocity. On April 16, 1975, following the Jupiter encounter, the micrometeoroid detector was turned off.
what is the atmosphere of the planet saturn The outer atmosphere of Saturn contains 96.3% molecular hydrogen and 3.25% helium by volume how are rings formed? They are composed predominantly of water ice, with trace amounts of tholin impurities and a peppered coating of approximately 7% amorphous carbon what are its physical characteristics? It is a gas giant because it is predominantly composed of hydrogen and helium, it lacks a definite surface, though it may have a solid core, its rotation causes it to have the shape of an oblate spheroid; that is, it is flattened at the poles and bulges at its equator does it have any moons? Yes, it has 82 known moons, 53 of which have formal names were there any missions carried out as a part of its research? Yes, "Pioneer 11" made the first flyby of Saturn in September 1979 who launched it? NASA
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Pioneer 11 [SEP] Encounter with Jupiter
"Pioneer 11" flew past Jupiter in November and December 1974. During its closest approach, on December 2, it passed above the cloud tops. The probe obtained detailed images of the Great Red Spot, transmitted the first images of the immense polar regions, and determined the mass of Jupiter's moon Callisto. Using the gravitational pull of Jupiter, a gravity assist was used to alter the trajectory of the probe towards Saturn and gain velocity. On April 16, 1975, following the Jupiter encounter, the micrometeoroid detector was turned off.