Technology NASA astronaut takes out-of-this-world SELFIE during a spacewalk 250 miles above the Earth

Astronaut Ricky Arnold took a break from his spacewalk to snap this stunning picture More

US & Canada Incredible moment NASA astronaut realizes he's left his memory card AT HOME during spacewalk

Hilarious footage taken from a NASA spacewalk on Wednesday shows even our most qualified astronauts are not immune to human mistakes. More

US & Canada NASA astronaut shares selfie taken on spacewalk above the Earth

NASA astronaut Ricky Arnold took this selfie during a spacewalk yesterday to upgrade the cooling systems on the station. More

Science & Environment NASA astronauts spacewalk on ISS to fix coolant pumps

A couple of spacewalking veterans floated outside the International Space Station Tuesday morning for the first of two planned spacewalks. More

Science & Environment NASA to Preview Pair of Upcoming US Spacewalks, Provide Live Coverage

Two NASA astronauts are scheduled to venture outside the International Space Station for a pair of six-and-a-half-hour spacewalks May 16 and 30. More