Bruce Murray Space Image Library

Voyager's best view of Proteus in color

Voyager's best view of Proteus in color
Voyager's best view of Proteus in color Proteus is Neptune's second largest moon, 416 kilometers in diameter. It is very dark and was not discovered until Voyager 2's approach to the system in 1989. NASA / JPL / color composite by Ted Stryk

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