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 force that draws material objects towards each other.
The launch of space vehicles and developments of research from them have led to great improvements in measurements of gravity around Earth, other planets, and the Moon and in experiments on the nature of gravitation.
The theory of gravity proposed by Newton stood for more than 200 years. Newton’s law of gravitation was one of the most successful theories ever produced. We still teach it in school, and most of us intuitively think of gravity as a force.
Newton’s law of universal gravitation describes gravity as a force between two masses, decreasing with distance. Einstein’s general theory of relativity redefines gravity as the curvature of spacetime caused by mass.
13.2: Newton's Law of Universal Gravitation All masses attract one another with a gravitational force proportional to their masses and inversely proportional to the square of the distance between them.
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.
There is no terrestrial gravitation for Earth and no celestial gravitation for the planets, but rather a universal gravitation for everything. Every object in the universe attracts every other object in the universe with a gravitational force.
Gravitation is a fundamental force of nature that governs the motion of objects throughout the universe. It is the attractive force that draws two bodies toward one another, resulting in a pull that depends on their masses and the distance separating them.