Gravity is the force of action between two objects. It’s called a natural force because it acts at a distance rather than needing to be in contact. Gravity is the force that holds us down on Earth and ...

Ten events that would unfold if gravity suddenly vanished, beginning with the effects on our bodies and ending with the ...

Earth and the Moon are forever locked in a gravitational embrace that has played a critical role in determining the fate of both worlds. Although they have grown more distant since their formative ...

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

The Earth isn't perfectly round IT'S FLAT. Ok not really, but it isn't as perfectly round as you'd expect from lessons in primary school or glancing briefly at a globe, either. First of all, why are ...

So the bottom line is that the gravity of the closer tidal bulge on the Earth is pulling the Moon forward, which increases the size of the Moon’s orbit. This means that the Moon gets slightly farther ...

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. Our ...

The European Space Agency (ESA)’s Juice mission is heading to Jupiter, but it isn’t traveling all that way in a straight line. Instead, like most solar system missions, the spacecraft makes use of the ...

This sci-fi concept could one day be a reality, say our readers, however the measurements would need to be exact to avoid ...

Discovering a machine that could somehow produce thrust without releasing propellant would be a game-changer for human space travel. There’s just one problem—such a device would defy the laws of ...