Atomic clocks, which depend in no way on gravitation, are already accurate to one part in 1010 (one second in more than 300 years). If a clock that depends on gravitation can be made anywhere near ...

That will help scientists study Earth’s gravity. According to ESA, an atomic clock measures time by observing an atom’s transition from an excited state to a ground state with a fixed frequency.

Clocks were driven by heavy weights that made ... A famous Swiss-French watchmaker named Abraham-Louis Breguet believed that gravity and positional stagnancy affected his watch movements by ...

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