Pioneer 11

Pioneer probe at Saturn

Pioneer 11 was the first probe to reach Jupiter and Saturn. It is not often remembered, I think because of Voyager 1 and 2 followed on relatively quickly, and these probes delivered much superior imagery.

But Pioneer 11 was important, not least because it established if it would be safe to send the voyagers very close to the giant planets – the amount  of radiation and debris near them was not clear before the encounters.

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