Pioneer 10 arrived at Jupiter on December 3, 1973, and Pioneer 11 arrived December 2, 1974. Pioneer 10 performed the first flyby of Jupiter by any space mission, at 82,656 miles (132,250 km) above the clouds. Pioneer 11 brushed by just 26,800 miles (42,900 km) from the cloud tops. This is just one-tenth the distance from the Earth to the Moon, so the missions were able to take high-resolution photos of Jupiter's atmospheric structure, and also to take measurements of the planet's magnetic field.
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