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

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, ...

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 Suni Williams and Butch Wilmore are returning to Earth on March 18 after an extended stay on the International Space Station, where they will face a variety of side effects such as space ...

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

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

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 ...

NASA astronauts Suni Williams and Butch Wilmore were selected for the first crewed test flight on Boeing's Starliner and were ...

CAPE CANAVERAL, Fla. (AP) — The replacements for NASA’s two stuck astronauts launched to the International Space Station on ...

Conservatives ripped Arizona Democratic Sen. Mark Kelly on social media after he posted a video explaining that Elon Musk is ...

Sen. Mark Kelly of Arizona said he could no longer stand the association with Elon Musk.

"Every time I get in this car ... it reminds me of just how much damage Elon Musk and Donald Trump is doing to our country," ...