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 ...

Then use the table above and the equation: Weight = mass x gravity ... of student on the surface of each planet in N 582 Planet Earth Gravity on the surface, g in N/kg 10 Mass of student on ...

It's been 286 days since astronauts Sonny Williams and Butch Wilmore have felt the pull of Earth's gravity. Gravity is really, really tough, tough, learning to live with it, but also without it.