Europa

Creator – Voyager 2
Medium – Satellite transmission
Source – National Air and Space Museum, Center for Earth and Planetary Studies

This image of Europa, one of Jupiter's moons, was taken by Voyager 2 from a distance of approximately 750,000 miles. The photograph's color reconstruction was enhanced slightly to bring out the details of the complicated, mottled region on the moon's west limb, which contains some of the linear, fracturelike features discovered by the spacecraft. The regions in the north and south polar areas, which here appear bluish, are in fact white. Voyager 2 was one of a pair of spacecraft launched to explore the planets of the outer solar system and the interplanetary environment. The major objective of the Voyager missions was to provide more information about the planets' atmospheres, satellites, size, shape, magnetic field structure, particles, and plasma.

Via the (awesome) Smithsonian Photography Initiative