In physics, gravity (from Latin gravitas 'weight'[1]), also known as gravitation or a gravitational interaction, [2] is a fundamental interaction, which may be described as the effect of a field that is …

Dec 4, 2025 · gravity, in mechanics, the universal force of attraction acting between all bodies of matter. It is by far the weakest known force in nature and thus plays no role in determining the internal …

In this section, we study the nature of the gravitational force for objects as small as ourselves and for systems as massive as entire galaxies. We show how the gravitational force affects objects on Earth …

Jul 19, 2025 · Combining both theories, Newton formulated a universal law of gravitation in the 17th century, which was accurate for every corner of the universe. Newton’s Law of Universal Gravitation …

Gravity or gravitation is a natural phenomenon by which all things with energy are brought toward (or gravitate toward) one another, including stars, planets, galaxies, and even light and sub-atomic …

Dec 24, 2025 · Explore how gravity works, from Newtonian gravity and gravitational force to general relativity and spacetime curvature, in a clear, science-backed guide for curious readers.

May 23, 2025 · Gravity wasn’t just something that happened on Earth—it extended into the heavens. For the first time, the same law explained both the fall of an apple and the orbit of the Moon. But even …

Sep 25, 2025 · The answer is gravity: an invisible force that pulls objects toward each other. Earth's gravity is what keeps you on the ground and what makes things fall. An animation of gravity at work. …

Our modern understanding of gravity comes from Albert Einstein’s theory of general relativity, which stands as one of the best-tested theories in science.

Explore Newton's law of universal gravitation, which describes the gravitational forces two masses exert on each other. Learn how the strengths of the gravitational forces are directly related to the objects' …