The Soviet Union launches unmanned space probe Luna 20 toward the moon, another robotic lunar lander with the capability of gathering a lunar soil sample and returning it to Earth. Over 50 grams of lunar material, including rocky material from the mountainous region near Luna 20’s landing site, are returned to Earth in a shielded re-entry capsule. The lander continues to operate for three days after the sample container is launched back to Earth.
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