NASA astronauts Mike Fincke and Zena Cardman are due to conduct the first spacewalk of 2026 outside the International Space Station. How to watch.

On Thursday, a pair of astronauts will venture outside the space station to prepare for the future installation of roll-out solar arrays that will help power its deorbit in 2030.

Space changes you. It strengthens some muscles, weakens others, shifts fluids within your body, and realigns your sense of balance. NASA's Human Research Program works to understand—and sometimes even counter—those changes so astronauts can thrive on ...