Buzz Aldrin, the second man and only one of 12 to ever walk on the moon, turns 96 today. He's just one of four living moonwalkers and the oldest remaining astronaut still making trips around the sun.

In an unprecedented move, NASA is bringing an astronaut crew home early from the International Space Station because one astronaut has an undisclosed medical condition.

For the 1st time in the history of the International Space Station, an astronaut experienced a health issue that required NASA to end a mission early.

Crew-11 was expected to splash down off the coast of California early Thursday.

As we prepare for missions beyond Earth orbit, one crucial challenge remains: keeping astronauts healthy in microgravity. Without daily exercise, their muscles, bones and cardiovascular systems weaken,

Memoir to be released in March recounts aspects of Wilmore's unexpected 286-day mission to the International Space Station.

It could be used to convert ambient mechanical energy — such as launch vibrations, planetary winds, and astronaut movements — into usable electricity. Printable, foldable, and ultra-compact, these power patches can be tucked inside a CubeSat or built directly into an astronaut’s glove to harvest energy from every movement.