An astronomical clock is a unique horological device that shows not just the time of day but also celestial events like the phases of the moon and the movement of the stars. Some other common synonyms for an astronomical clock include "astrological timepiece", "celestial chronometer", "astronomical timekeeper", and "cosmic clock". These terms all suggest the use of astronomical and astrological knowledge to determine the movements of the celestial bodies and the passage of time. Regardless of the specific term used, all astronomical clocks are complex and fascinating works of art, offering insights into the ancient science of astronomy and the craftsmanship of skilled clockmakers.