1. 1961
  2. 1970
  3. 1975
  4. 1980
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1 Answers

Answer: Option 1

The first human spaceflight was launched by the Soviet Union on 12 April 1961 as a part of the Vostok program, with cosmonaut Yuri Gagarin aboard. Humans have been continuously present in space for 18 years and 121 days on the International Space Station.

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