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What is gravity?

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Gravitation is a natural phenomenon that gives weight to objects. In everyday life, attraction due to gravity is the result of the presence of relatively large bodies, such as the Earth and the Moon. Gravitation not only causes attraction to very large bodies, but can also distort the surface of planets and other natural satellites, causing tides, earthquakes. In outer space, gravity between particles of interstellar dust gives rise to stars and planets. The very existence of the Sun and every star in the universe is the consequence of inelastic collisions caused by internal friction of dusty nebulas. As this occurs, flows known as convection (by which fluid flow occurs under the influence of a temperature gradient and gravity) distribute the heat caused by friction.

Includes CC-BY-SA content from Wikipedia's Gravitation article (authors)

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