The 50th anniversary of the “Soyuz-9” space mission.
The envelope devoted to the “Soyuz-9” space flight was autographed by cosmonauts Andrian Nikolayev and Vitali Sevastyanov. Soviet cosmonauts Andrian Nikolayev and Vitali Sevastyanov spent in space 17 days, 16 hours, 58 minutes and 55 seconds. At that time,
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