Space changes the human body in measurable ways, affecting bones, muscles, vision, fluid balance, and more during long-duration missions.

Learn how astronauts stay fit in microgravity, what equipment they use, and why daily exercise is essential on the International Space Station.

Math powers spacecraft design, mission planning, navigation, and data analysis in every modern space career.

Astronauts face rapid physical and operational changes after landing, from readjusting to gravity to medical monitoring and rehabilitation.

Learn how astronauts prevent muscle loss in microgravity with exercise, nutrition, and medical monitoring during long-duration space missions.

Learn how microgravity changes muscles, bones, fluids, the heart, and vision, and why astronauts need strict countermeasures in space.

Learn why astronauts lose muscle in space, how microgravity affects the body, and what NASA does to reduce muscle loss in orbit.

Compare SpaceX and NASA space suits by design, pressure systems, mobility, life support, and mission use.

Learn why astronauts develop vision changes in space, what causes spaceflight-associated eye issues, and how NASA studies protect eyesight.

Space jobs are competitive because the industry is small, specialized, and growing fast. Learn what employers want and how candidates can improve their odds.