NASA/JPL

Stories Behind Voyager's Discoveries

Three original NASA images reveal what the spacecraft saw, what scientists could conclude, and where to find the primary sources.

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01 / 03

Io: a volcanic plume beyond Earth

Voyager 1 photographed an eruption on Jupiter's moon Io in 1979. The image helped establish the first observed active volcanism beyond Earth.

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02 / 03

Triton: plumes above an icy moon

A sequence of Voyager 2 images from 1989 captured an active dark plume on Triton, Neptune's largest moon.

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03 / 03

Pale Blue Dot: Earth from Voyager 1

Voyager 1 looked back in 1990 and recorded Earth as less than a pixel. The familiar version shown here is a 2020 reprocessing of those data.

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Voyager discoveries at the planets · Gallery