An astronomical clock is a special kind of clock that shows the position of the sun and moon in the sky, as well as other information about the stars and planets. Astronomical clocks usually use gears, levers, and dials to show how the sun and moon move in the sky. They also can tell time based on the movements of the planets and stars in the night sky. Astronomical clocks can help us understand how the stars and planets have moved over time, and it can help us tell time more accurately than a regular clock!