Picture of the day

The World Clock, located in Alexanderplatz in Berlin, Germany, is a large world clock displaying the local time in 148 locations across the world. It consists of a 24-sided column, each side of which represents a time zone on Earth and is engraved with the names of various cities. A row of numbers, from 1 to 24, revolve around the outside of the clock during the day, indicating the local time in each time zone. Once per minute, an artistic sculptural rendering of the Solar System made of steel rings and spheres rotates above the clock. Including the sculpture, the World Clock is 10 metres (33 feet) high. It was erected in 1969 to mark the twentieth anniversary of the German Democratic Republic, and was designed by Erich John, a lecturer at the Weißensee Academy of Art Berlin. In July 2015, the German federal government declared the clock to be a historically and culturally significant monument. This long-exposure photograph shows the World Clock at night.Photograph credit: Diego Delso