In physics, gravity (from Latin gravitas 'weight' ) is a fundamental interaction primarily observed as mutual attraction between all things that have mass. Gravity is, by far, the weakest of the four fundamental … See more

In modern physics, general relativity remains the framework for the understanding of gravity. Physicists continue to work to find See more

Earth's gravity
Every planetary body (including the Earth) is surrounded by its own gravitational field, which can be … See more

Historical alternative theories
• Aristotelian theory of gravity
• Le Sage's theory of gravitation (1784) also called LeSage gravity but originally proposed by Fatio and further elaborated by Georges-Louis Le Sage, based on a fluid-based … See more

Ancient world
The nature and mechanism of gravity were explored by a wide range of ancient scholars. In Greece, Aristotle believed that objects fell towards … See more

There are some observations that are not adequately accounted for, which may point to the need for better theories of gravity or perhaps be … See more

• Anti-gravity – Idea of creating a place or object that is free from the force of gravity
• Artificial gravity – Use of circular rotational force to mimic gravity
• Equations for a falling body – Mathematical description of a body in free fall See more