General Knowledge · Space Exploration
1957 में प्रक्षेपित कौन सा कृत्रिम उपग्रह पृथ्वी की कक्षा में जाने वाला पहला उपग्रह बना और उसने अंतरिक्ष युग की शुरुआत की?
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स्पुतनिक 1
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