The Soviet Union launches Zond 3, an unmanned spacecraft nearly identical to the failed Mars-bound space probe Zond 2, on a trajectory that will swing past the moon on its way to interplanetary space. It would make its closest flyby to the moon on July 20th, 1965, four years to the day prior to the first manned lunar landing, taking photos of the far side of the moon as it heads into deep space. Zond 3 proceeds on a trajectory toward the orbit of Mars, even though it will be too far away from the planet to study it.
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