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Viking: The Tenth Anniversary

Viking: The Tenth Anniversary
Viking: The Tenth Anniversary Ten years ago Viking 1 reached Mars, and the doughty little spacecraft began to turn the mysterious Red Planet into a familiar place to scientists and television viewers back on Earth. Here, the spacecraft looks across the cratered surface to the cloud-streaked horizon. Argyre Planitia, the large, smooth basin in the lower left, is probably the remnant of an asteroid impact. JPL / NASA