Mom's changing body. You've made it to the third trimester and even though you're on the home stretch, you're probably about ready to be done with pregnancy! In your final trimester, you'll feel the physical toll of pregnancy. The extra weight can lead to musculo-skeletal pain, and fatigue can slow you down even more.
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.
The International Space Station (ISS) is a habitable human-made satellite that orbits Earth at an altitude of between 330 km (205mi) and 435 km (270 mi). The ISS comprises pressurised modules for astronauts to live in, external trusses for propulsion, solar arrays for power and many other amazing components.