What is gravity?

Gravity is a force of attraction. This is a force of pull. When you jump you are pushing against the powerful pull of earth. These pulls that cause objects to move each other are called gravity. Scientists have discovered how gravity works on earth and in outer space.

Gravity is a force of attraction that exists between any two masses, any two bodies, any two particles. Gravity is not just the attraction between objects and the Earth. It is an attraction that exists between all objects, everywhere in the Universe. Sir Isaac Newton (1642 -- 1727) discovered that a force is required to change the speed or direction of movement of an object. He also realized that the force called "gravity" must make an apple fall from a tree, or humans and animals live on the surface of our spinning planet without being flung off. Furthermore, he deduced that gravity forces exist between all objects. Newton's "law" of gravity is a mathematical description of the way bodies are observed to attract one another, based on many scientific experiments and observations. The gravitational equation says that the force of gravity is proportional to the product of the two masses (m1 and m2), and inversely proportional to the square of the distance (r) between their centers of mass. Mathematically speaking, F=Gm1m2 / r2, where G is called the Gravitational Constant. It has a value of 6.6726 x 10-11 m3 kg-1 s-2. The effect of gravity extends from each object out into space in all directions, and for an infinite distance. However, the strength of the gravitational force reduces quickly with distance. Humans are never aware of the Sun's gravity pulling them, because the pull is so small at the distance between the Earth and Sun. Yet, it is the Sun's gravity that keeps the Earth in its orbit! Neither are we aware of the pull of lunar gravity on our bodies, but the Moon's gravity is responsible for the ocean tides on Earth.

Gravity is the tendency of a mass to pull another mass and also pulled by the other mass towards each other. It is this parameter that makes all the stars and planets to maintain their positions as well as movements in this vast Universe. If it will vanish, stars and planets will be setteled nowhere! You may think it deeply to vizualize. Thanks for this 'Gravity' discussion.

To put it simply, gravity is attraction. Everything that has mass has gravity, so you and I have our own gravitational field. You'll probably find however, that things don't get attracted and stuck on to you. This is because the larger the mass, the greater the gravitational field. Since the Earth's gravitational field is strong (compared to the things on it), we don't notice our own gravitational fields. This is also why you would weigh less on the moon, since it is a smaller body than the Earth, you would be pulled down towards the moon with less force.

gravity works by... well... there's this subatomic particle called graviton (scientist havent proven that this thing exist yet) that basically controls gravity. how does it work? well imagine you're throwing a basketball on a frictionless ground. if you throw it, you'd move backward. now, if you throw that basketball to somebody, he would move backwards too. almost same thing with gravity except its reverse of that. imagine throwing basketball, but instead of moving backwards you'd move forwards.