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.

Smaller bodies of water, like lakes and pools, don't have noticeable tidal bulges because they lack enough liquid to create pressure that can visibly overcome the pull of Earth's gravity.

It's been 286 days since astronauts Sonny Williams and Butch Wilmore have felt the pull of Earth's gravity. Gravity is really ...

For over half a century, scientists suspected a quiet but powerful electric field might be influencing Earth’s upper ...

NASA identifies five significant risks that could hinder a successful manned mission to Mars, including cosmic radiation and ...

Getting high enough to escape Earth's atmosphere takesa massive amount ... So gravity pulls everything downwards,all the time, but we can overcome gravity if we have enough force inthe opposite ...