NASA doctors are monitoring the second astronaut stranded on the International Space Station — and making sure that he isn’t losing too much weight during his extended stay in space.

As space travel gains traction and astronauts spend increasing amounts of time in space, studying its effects on health has ...

And though weightlessness allows astronauts to spin, rotate, and float through the air, it has a downside. Without the force of gravity to fight against, muscles of the body begin to deteriorate ...

The low levels of gravity (microgravity) in space cause significant changes in astronauts' eyes and vision after six to 12 ...

A civil rights trailblazer and daughter of Vietnamese boat refugees, Amanda Nguyen will be the first Southeast Asian woman astronaut — and her upcoming mission carries profound significance.

An HTC headset designed to work in space is offsetting the physical and psychological challenges of humans living off-world.

“Weightlessness alters the distribution of blood in the ... Even though 80% of the studied astronauts exhibited at least one ...