What happened to NASA astronaut Scott Kelly after spending a year in space while twin brother Mark, also an astronaut, remained at home?

NASA astronauts Sunita Williams and Butch Wilmore are set to return to Earth after an extended nine-month mission aboard the ...

The European Space Agency (ESA) says that just one week in space is equivalent to one year's worth of radiation exposure on Earth. This radiation can put astronauts at risk of radiation sickness, ...

Astronauts Barry “Butch” Wilmore and Suni Williams are on their way back to Earth after nearly nine months in space and will soon be readjusting to life with gravity.

Down to their very DNA, astronauts’ bodies can change in weird and sometimes significant ways, particularly during a long flight high above the Earth: They start to elongate, often developing a taller ...

After docking with the ISS, the latest crew visiting the orbital outpost were greeted by a cosmonaut wearing an alien mask.

The zinnia flowers were grown in the Veggie facility, a low-cost growth chamber that provides lighting and nutrient supply for plants on the ISS. Astr ...

US astronauts Barry "Butch" Wilmore and Sunita "Suni" Williams are Earthbound Tuesday after more than nine months in space. But now, they have a new mission: recovery. Why it matters: Muscle atrophy, ...

Suni Williams and Butch Wilmore originally planned to stay just a week on the space station, but problems with their Boeing ...

Two astronauts, who spent more than nine months in orbit after a bungled Boeing test flight, have finally said goodbye to their orbiting home.