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Mars exploration, found hematite and evidence for past water, operated for nearly 15 years.

Captured some of the most detailed visible light images, helped to determine the rate of expansion of the universe, discovered moons around Pluto.

Studied Neptune and Uranus, first robot to fly by all four outer planets, discovered 14 new moons of the planets it visited.

First reconnaissance of Pluto, characterized Pluto's atmosphere and surface, studying Kuiper Belt objects.

Mars exploration, discovered evidence of past water activity, studied geology of Martian surface.

First spacecraft to enter interstellar space, sent back the famous 'Pale Blue Dot' photo, studied Jupiter and Saturn.

Mars exploration, seeking signs of ancient life, collecting soil and rock samples for future return to Earth.