Sunita "Suni" Williams had an unexpectedly long stay at the International Space Station after her capsule malfunctioned.

NASA astronauts Suni Williams and Barry "Butch" Wilmore returned to Earth on Tuesday after spending some nine months in space ...

NASA’s AWE mission just released millions of gravity wave images from space, unveiling atmospheric forces that ripple through ...

The Earth and a starry night appear to merge into one strange and otherworldly sci-fi trip in this mind-bending photo ...

HH 49/50 is one of these impact sites. It was nicknamed the "Cosmic Tornado" due to its dramatic, swirling shape. Spitzer's ...

NASA is monitoring a bus-sized asteroid as it makes its closest approach to Earth today, among a group of five space rocks ...

A space robot said "goodnight" to the moon as it completed its mission, capturing the first high-definition images of a lunar ...

Butch Wilmore and Suni Williams left the International Space Station after nine months in space, checking out with two other ...

A four-member crew, including NASA astronauts Sunita "Suni" Williams and Barry "Butch" Wilmore, left the ISS early Tuesday on ...

Dolphins surrounded the SpaceX capsule after it landed in the ocean on the NASA astronauts' successful journey home after ...

Four astronauts were all smiles Tuesday evening when they splashed down off the Florida coast on a SpaceX Dragon capsule. See ...

As well as a shift in fluid causing their faces to puff, the microgravity in space would have also triggered muscle atrophy, ...