What Is a Chronometer Watch?

The astronomical clock is a specially designed instrument that can express space-time operation of celestial bodies in various forms. It is a combination of power machinery and many transmission machinery, using several sets of gear trains to slow down the movement of the wheel, so that it often maintains a constant speed, consistent with celestial movement. The astronomical clock can display both astronomical and timekeeping. Later watches and clocks have evolved from this. It can show the relative positions of the sun, moon, and constellation at that moment, and some even show the positions of major planets.