This mosaic shows the planet Mercury as seen by Mariner 10 as it sped away from the planet on March
This mosaic shows the planet Mercury as seen by Mariner 10 as it sped away from the planet on March 29, 1974. The mosaic was made from over 140 individual TV frames taken about two hours after encounter, at a range of 37,300 miles (60,000 kilometers) -- source link
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