You may have heard people say that aboard the International Space Station (ISS) there's "zero gravity," but in fact, gravity is still very much present. The station orbits Earth at an altitude of ...

Gravity, in the literal sense, keeps everyone (and everything) on Earth grounded. It acts as the anchor that prevents objects from floating skyward. For humans, it’s a leash that stops us from ...

Root explores how Earth’s gravity field is constantly changing and what these variations reveal about our planet ...

The Earth is a dynamic system constantly undergoing change. As the processes of change affect the Earth's topography—the heights of land, ice, and ocean surfaces—they also modify the distribution of ...

How can it be that the Moon's mass is a little over 1 percent of Earth's mass, while its gravity is about 17 percent of Earth's gravity? Why aren't the mass and gravity more closely correlated? John ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Here’s what you’ll learn when you read this story: Earth’s gravity keeps us securely on terra firma—it’s ...

[ADDENDUM 11/26/12: It has been pointed out to me that two planets that have the same surface gravity won't necessarily have the same escape velocity, which appears to undermine my argument that it ...

A suitcase-sized quantum sensor could soon reveal hidden water, oil, and even underground mountains—all by tracking how atoms fall. Reading time 2 minutes Buckle up, nerds: NASA is building the first ...

In geodesy, the Earth's gravitational field is commonly expressed as an expansion in spherical harmonic functions. These functions arise when Laplace's equation (the fundamental differential equation ...