Large format photograph of the first close up of the Planet Jupiter with its Moon Io's shadow taken by NASA's first mission to the outer planets, Pioneer 10, 2 December 1973 Vintage chromogenic print, 28 x 35 cm (11 x 14in), flush mounted on original 51 x 61cm (16 x 20in) NASA cardFootnotes: Pioneer 10 was NASA's first mission to the outer planets. The mission was a spectacular success and the spacecraft notched a series of firsts unmatched by any other robotic spacecraft to date. This photo of Jupiter, snapped by Pioneer 10 from a range of some 1.57 million miles (2.5 million km), shows the planet's Great Red Spot as well as the shadow of the moon Io traversing the cloud tops.