The force that pulls objects toward each other, especially the force that pulls objects toward Earth and keeps planets orbiting the sun.
From Late Latin 'gravitatio,' derived from 'gravis' meaning 'heavy.' Isaac Newton formalized the concept in the 1680s with his law of universal gravitation. The suffix '-tion' creates an abstract noun.
Gravitation is so powerful that it warps space and time itself—Einstein showed that massive objects literally bend the fabric of the universe, making light curve around them, which we call lensing!
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