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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. Albert Einstein described gravity as a curve in space that wraps around an object—such as a star or a planet.
What Is Gravity? | NASA Space Place – NASA Science for Kids
Learn what gravity is in physics and astronomy. Get the definition, formulas, and table of gravity on other planets.
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 properties of everyday matter.
Gravity is the force of fundamental attraction between all things that have mass or energy. It feels powerful to us in our daily lives, but it is by far the weakest of the four known forces in nature.
We understand that gravity is fundamentally a purely attractive force – it can only pull, never push – and that it is generated by any object with mass. But humankind has been trying to find a better answer to the question 'what is gravity?' for hundreds of years.
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 particles.
