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

According to scientists, this ambipolar electric field is thought to be just as crucial to Earth as both gravity and magnetism.

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 ...

Gravity is the force of attraction which acts between all objects that have mass. It is an invisible force, pulling all objects with mass toward each other. The Earth's gravity is what keeps you ...

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.