Contrary to what you may intuit, the Earth's gravity isn't uniform, and there's one place where it's much weaker than anyone ...

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

What did Newton understand that was such a revolution? Can someone just... explain gravity to me? Let's start with a ...

We know more about the Moon’s surface than Earth’s ocean floor — but that’s changing fast. A NASA-supported team used a ...

Its surface gravity is 37.5 percent of Earth’s. Mars rotates on its axis every 24.6 Earth hours, defining the length of a Martian day, which is called a sol (short for “solar day”).

Gravity close gravityThe force of attraction between all objects. The more mass an object has, the larger the force of gravity it exerts. is a force that attracts objects towards each other. The ...