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Soviet stamp issued to celebrate the 5th Anniversary of Sputnik 1, launched October 4, 1957, the first human-made object to orbit the Earth. That launch took place on October 4, 1957 as part of the International Geophysical Year and demonstrated the viability of using artificial satellites to explore the upper atmosphere.
russia | ussr | soviet | space | stamp | space stamp | science | astronomy | space flight | stamp collecting |
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