Astronaut

Astronauts often suffer from sleep deprivation during space flight and in the months leading up to a mission, a new study finds.

German astronaut Alexander Gerst reflected on the grief he felt as he saw signs of the deadly Israel-Gaza conflict from the International Space Station.

Tropical Storm Arthur appears menacing as it bears down on the coast of Florida, in this photo captured today (July 2) by astronauts aboard the International Space Station.

Neil Armstrong was more than a hero — he was a down-to-earth, deeply complex, brilliant, three-dimensional human being.

Medications used to treat astronauts in zero gravity might not work as well as they do on Earth.

A long journey in space may actually compromise the immune system and make astronauts more susceptible disease.

Some astronauts reported blurred vision that lasted months after their return to Earth.