Sundial

:This article pertains to the astronomical instrument. For the psychedelic rock band, see Sun Dial.

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A sundial measures time by the position of the sun.

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The most commonly seen designs, such as the 'ordinary' or standard garden sundial, cast a shadow on a flat surface marked with the hours of the day.

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As the position of the sun changes, the time indicated by the shadow changes.

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However, sundials can be designed for any surface where a fixed object casts a predictable shadow.

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Most sundial designs indicate apparent solar time.

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Minor design variations can measure standard and daylight saving time, as well.

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Sundials are known from ancient Egypt, and were developed further by other cultures, including the Greeks and Romans. The mathematician and astronomer Theodosius of Bithynia (ca. 160 BC-ca. 100 BC) is said to have invented a universal sundial that could be used anywhere on Earth. The French astronomer Oronce Fine constructed a sundial of ivory in 1524. The Italian astronomer Giovanni Padovani published a treatise on the sundial in 1570, in which he included instructions for the manufacture and laying out of mural (vertical) and horizontal sundials.

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Psychedelic rock: Psychedelic rock is a style of rock music that is inspired or influenced by psychedelic culture and attempts to replicate and enhance the mind-altering experiences of psychedelic drugs. It emerged during the mid 1960s among folk rock and blues-rock bands in United States and Britain. It often used n...

Sun Dial: Sun Dial (occasionally spelled Sundial) is a British psychedelic rock band formed in 1990 by Gary Ramon....

Time: :For alternate uses of "time", see Time (disambiguation) or see TIME (magazine)....

Sundial related Images and Photos (experimental)

Sun Dial In Stalybridge Cheshire	Sundial Ring	Tablet Sundial circa 1599	Trail to the Sexton Sundial Sesto Italy
Artist Paul Manship with Models of Sundial Sculpture for the 1939-40 World's Fair