Gravity

Gravity is the natural force by which all objects with mass or energy are attracted toward one another. It gives weight to objects and governs the motion of planets, stars and galaxies.

Newton and Einstein

Isaac Newton described gravity as a force acting between masses. Einstein's general relativity later described it as the curving of spacetime by mass and energy.

Effects

Gravity keeps us on the ground, holds the atmosphere in place, causes tides and keeps the Earth in orbit around the Sun.

Frequently asked questions

What is gravity?

The attractive force between objects with mass.

Who discovered gravity?

Isaac Newton described its laws; Einstein later refined the theory.