Pioneer 11 at JupiterNASA’s Pioneer 11 space probe passes close to Jupiter, barely 27,000 miles above the giant planet’s cloudtops, again encountering radiation capable of frying spacecraft electronics. Pioneer 11 captures the first images of Jupiter’s polar cloud structure and pulls off a daring gravity assist maneuver: the planet’s gravity flings Pioneer 11 up and over the north polar region and across the solar system for a 1979 rendezvous with Saturn, the first spacecraft to visit that planet.