Answer: cosmonaut

AnswerCrossword Clue
COSMONAUTLiterally, "universe sailor"
COSMONAUTOne term for a spaceman.
COSMONAUTPopovich, for one.
COSMONAUTYuri Gagarin, e.g.
COSMONAUTPopovich or Gagarin, e.g.
cosmonautA Russian astronaut
cosmonauta Russian astronaut