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For questions about the universal accelerative force between all objects.

Gravitation, more commonly known as gravity, is a natural phenomenon by which mass and/or energy attracts other objects by bending space-time.

It's mathematical properties were first described by Isaac Newton in 1687 but were later further refined by Albert Einstein in 1915.

Gravity is most often observed on celestial bodies as an invisible force pulling everything close enough to the celestial body 'down'.

For questions regarding the effects of gravity on celestial bodies, consider using the or tags.