Gravitation is a natural phenomenon by which objects with mass attract one another.In everyday life, gravitation is most
commonly thought of as the agency which lends weight to objects with mass. Gravitation compels dispersed matter to
coalesce, thus it accounts for the very existence of the Earth, the Sun, and most of the macroscopic objects in the
universe. It is responsible for keeping the Earth and the other planets in their orbits around the Sun; for keeping the Moon
in its orbit around the Earth, for the formation of tides; for convection (by which hot fluids rise); for heating the interiors of
forming stars and planets to very high temperatures; and for various other phenomena that we observe. Modern physics
describes gravitation using the general theory of relativity, in which gravitation is a consequence of the curvature of
spacetime which governs the motion of inertial objects. The simpler Newton's law of universal gravitation provides an
excellent approximation for most calculations.

The terms
gravitation and gravity are mostly interchangeable in everyday use, but a distinction may be made in scientific
usage. "Gravitation" is a general term describing the phenomenon by which bodies with mass are attracted to one
another, while "gravity" refers specifically to the gravitational force exerted by the Earth on objects in its vicinity


Source: WikipediA
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