This new propulsion system could rewrite the rules of spaceflight—not to mention completely defy conventional physics.

Could a reactionless, gravity-defying propulsion system actually work? A former NASA engineer says yes, but scientists are skeptical.

The Capillary Cup is a zero-gravity cup designed by NASA astronaut Donald Pettit on the International Space Station. The product is an open drinking cup designed to be used in a microgravity ...

NASA astronaut Sunita Williams will face another daunting challenge after her extended mission aboard the International Space Station - that to readjust to Earth's gravity. Williams and fellow ...

As Sunita Williams and Barry "Butch" Wilmore prepare to return after nine months in microgravity, all eyes are on how their bodies will handle Earth’s gravity again. The European Space Agency ...

Ever wondered what happens if you start crying in space? Read on. What happens when you strike a match in zero gravity? The first thing Neil would like to make clear is this - it isn’t advisable ...

Just gravity. Breaking space news, the latest updates on rocket launches, skywatching events and more! To test this hypothesis, the team created an exceptionally simple simulated galaxy.