is considered an extraterrestrial he s a legend who has lived in space longer than anyone else so far. on 5 space missions he managed a total of $879.00 days of weightlessness that s 2 and a half years in other words the estimated duration of a journey to mars more charges reach for about 12 hours millard ever be possible for humans to live and work in outer space. over the last 50 years countless experiments have been carried out and more experience has been gained with the trials that it was almost. human organism has become more resistant to the aggressive conditions in space for some of the crew members psychological compatibility is the greatest challenge or going to. be ideal crew or cosmonaut doesn t exist and never will we re not robots on your own but. when you wanted to