astronaut height requirements
NASA astronaut candidates must also pass a demanding physical. Among the requirements: 1  20/20 vision (either naturally or with corrective lenses). 2  blood pressure not more than 140/90 in a sitting position. 3  a height of between 62 and 75 inches. typical spaceflight these days for a NASA astronaut lasts six months on the International Space Station, but some astronauts are now being assigned to year-long flights to learn more about the human body. Science will take up most of an astronaut's time in orbit.