Astronomical clock. View of an astronomical clock. As well as telling the time, the clock shows the position of the Sun and Moon relative to the twelve astrological star signs of the zodiac. The phases of the Moon are also seen. Here the Moon is almost totally black as it is close to new. At the centre of the clock is a calendar dial with the names of the months written on it. Photographed on the wall of the Musee Alsacean in Haguenau, France. The building is a former chancellery that was built in 1486.