This is an astronomical clock made by Song I-yeong, who was an astronomy professor in 1669 during the reign of King Hyeonjong ...

Jens was 60 when he started constructing the clock, but the story starts when he was only 25. In Strasbourg, the young locksmith saw an astronomical clock with a perpetual calendar in a cathedral.

Despite having recently officially ended its science operations in January, Gaia, one of the most prolific star explorers ...

The practice of daylight saving time spans over a century of U.S. law. Here's who started it and why we observe the time ...

Daylight savings begins this weekend. Will Ohio always have to spring forward? Here's what to know about the time change and its future in Ohio.

Located in the Old Town Square, the Prague Astronomical Clock has been around since the 15th century, though it has required repairs many times over its history. This clock doesn't display the ...

For its first 300-or-so years, the clock looked a little more basic than it does today. In 1530, the astronomical clock workings were added further down the structure. Tourists regularly gather at ...