Gravity is a force of attraction that acts between bodies that have mass.
Gravity is the reason for the very existence of the earth, the sun and other celestial bodies; without it matter would not have coalesced into these bodies and life as we know it would not exist.
Gravity is also responsible for keeping the earth and the other planets in their orbits around the sun, the moon in its orbit around the earth, for the tides, and for various other natural phenomena that we observe.
For more information about the topic Gravitation, read the full article at Wikipedia.org, or see the following related articles:
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