Definition: Horology refers to an art form in which objects are observed for their appearance or behavior over time, with the goal of creating a continuous or repeating pattern. This art form has been used historically by artists to depict everyday objects and landscapes in a repetitive way. In the context of horology, one might see it as a method for tracking changes in an object's appearance or behavior over time, using tools such as telescopes or other observatories. By observing the same object at different times, one can create a pattern that represents how its appearance has changed and can be used to create a continuous sequence. The term "horology" is often associated with the French philosopher Auguste Rodin's work on the concept of horological art in his seminal book The History of Art (1863). This book argued for the value of art that was purely aesthetic, not limited by any specific subject matter or artistic technique. It called for a form of art that could be appreciated and understood without a prior understanding of the artist's work. In summary, horology is an art form that uses tools such as telescopes, microscopes, and other instruments to observe objects over time, creating patterns that are repeated and repeatable. It has been used historically by artists and philosophers to depict everyday objects and landscapes in a repetitive or continuous manner, often with the goal of creating a sequence or pattern. The word "horology" is derived from the Latin word horus meaning "sun," which was used as a prefix to identify celestial phenomena. The term "horological" refers to an art form that studies objects over time and creates repeating patterns based on observation.