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1. The first man-made satellite , Sputnik -I was launched by the former USSR in -
- A. 1957
- B. 1957
- C. 1957
- D. 1957
Answer: Option A
Explanation:
In October 1957, the Soviet Union launched Sputnik 1, the world's first artificial satellite. The 184 - pound 22.5 - inch sphere orbited the earth once every 96 minutes. Sputnik transmitted radio signals for 21 days and later burned up in the earth's atmosphere.
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