the.com/law of gravity

means The scientific principle that every object with mass pulls on every other object with mass, which is why things fall down and planets stay in orbit instead of drifting off into nothing.

from 'Gravity' comes from Latin 'gravis,' meaning heavy or weighty — the same root that gives us 'grave' and 'grief,' all carrying that sense of being weighed down. The idea of a 'law' of gravity crystallizes with Isaac Newton in the late 1600s, who formalized the pull between masses into mathematics in his Principia. The popular story has an apple bonking him on the head — a charming tale he himself told late in life, though most historians treat it as a simplified or embellished memory rather than a literal moment of discovery. Centuries later Einstein would reframe gravity not as a force at all but as the curvature of spacetime itself — proof that even the universe's sternest rule had more to explain about itself.