valeri polyakov was the astronaut who has spent the most time in space.
valeri polyakov was the astronaut who has spent the most time in space.
astronaut who has spent the most time in space?
valeri polyakov
, under the u.s. definition, 558 people qualify as having reached space, above altitude. of eight x-15 pilots who exceeded in altitude, only one exceeded 100 kilometers (about 62 miles). space travelers have spent over 41,790 man-days (114.5-man-years) in space, including over 100 astronaut-days of spacewalks. , the man with the longest cumulative time in space is gennady padalka, who has spent 879 days in space. peggy a. whitson holds the record for the most time in space by a woman, 377 days.









































section::::terminology.
astronaut
selected by nasa as an astronaut candidate in june 1985, cabana completed initial astronaut training in july 1986, qualifying for assignment as a pilot on future space shuttle flight crews. his initial assignment was as the astronaut office space shuttle flight software coordinator until november 1986. at that time he was assigned as the deputy chief of aircraft operations for the johnson space center where he served for years. he then served as the lead astronaut in the shuttle avionics integration laboratory (sail) where the orbiter's flight software is tested prior to flight. cabana has served as a spacecraft communicator (capcom) in mission control during space shuttle missions, and as chief of astronaut appearances. prior to his assignment to command sts-88, cabana served three years as nasa’s chief of the astronaut office. following sts-88, cabana served as the deputy director of flight crew operations. after joining the iss program in october 1999, cabana served as manager for international operations. from august 2001 to september 2002, he served as director of human space flight programs, russia. as nasa's lead representative to the russian aviation and space agency (rosaviakosmos) and its contractors, he provided oversight of all human space flight operations, logistics, and technical functions, including nasa's mission operations in korolev and crew training at the gagarin cosmonaut training center in star city, russia. upon his return to houston, cabana was assigned briefly as the deputy manager of international space station (iss) program. from november 2002 to march 2004, he served as director of flight crew operations directorate, responsible for directing the day-to-day activities of the directorate, including the nasa astronaut corps and aircraft operations at ellington field. he was then assigned as deputy director of the johnson space center, where he served for three and a half years. from october 2007 through october 2008, cabana served as director of john c. stennis space center. in october 2008 he was reassigned as director of the john f. kennedy space center.
robert d. cabana