ed ▁at ▁the ▁center . ▁In ▁March ▁the ▁cos mon aut s ▁were ▁started ▁on ▁a ▁daily ▁fit ness ▁regime , ▁and ▁were ▁taught ▁classes ▁on ▁topics ▁such ▁as ▁ro cket ▁space ▁systems , ▁navigation , ▁ge oph ys ics , ▁and ▁astronom y . ▁ ▁O wing ▁to ▁the ▁initial ▁facility ' s ▁space ▁limitations , ▁the ▁cos mon aut s ▁and ▁staff ▁were ▁re located ▁to ▁a ▁new ▁facility ▁in ▁Star ▁City ▁( then ▁known ▁as ▁Z elen yy ), ▁which ▁has ▁been ▁the ▁home ▁of ▁Russia ' s ▁cos mon aut ▁training ▁program ▁for ▁over ▁ 6 0 ▁years . ▁The ▁move ▁officially ▁took ▁place ▁on ▁June ▁ 2 9 , ▁ 1 9 6 0 . ▁ ▁V angu ard ▁Six ▁At ▁the ▁G rom ov ▁Fl ight ▁Research ▁Institute , ▁a ▁space craft ▁sim ulator ▁had ▁been ▁built , ▁called ▁the ▁T DK - 1 . ▁O wing ▁to ▁the ▁in e ffic iency ▁of ▁training ▁all ▁ 2 0 ▁cos mon aut s ▁in ▁the ▁sim ulator , ▁it ▁was ▁decided ▁they ▁would ▁select ▁six ▁men ▁who ▁would ▁go ▁through ▁acceler ated ▁training . ▁This ▁group , ▁which ▁would ▁be ▁known ▁as ▁The ▁V angu ard ▁Six , ▁was ▁decided ▁on ▁May ▁ 3 0 , ▁ 1 9 6 0 , ▁and ▁initially ▁consisted ▁of ▁G ag arin , ▁K art ash ov , ▁Nikol ay ev , ▁Pop ov ich , ▁Tit ov , ▁and ▁Var lam ov . ▁Alex ei ▁Leon ov ▁rec alls