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World's oldest known sundial, from Egypt's Valley of the Kings (c. 1500 BC), used to measure work hours. [1] [2] [3]A sundial is a device that indicates time by using a light spot or shadow cast by the position of the Sun on a reference scale. [4]
An astronomical instrument is a device for observing, measuring, or recording astronomical data. [ citation needed ] They are used in the scientific field of astronomy , a natural science that studies celestial objects and the phenomena that occur in the cosmos, with the object of explaining their origin and evolution over time.
The gnomon is the triangular blade in this sundial.. A gnomon (/ ˈ n oʊ ˌ m ɒ n,-m ə n /; from Ancient Greek γνώμων (gnṓmōn) 'one that knows or examines') [1] [2] is the part of a sundial that casts a shadow.
Bracket arm clusters containing cantilevers, Yingzao Fashi. The Yingzao Fashi (Chinese: 營造法式; pinyin: yíngzàofǎshì; lit. 'Treatise on Architectural Methods or State Building Standards') is a technical treatise on architecture and craftsmanship written by the ancient Chinese author Li Jie (李誡; 1065–1110), [1] the Directorate of Buildings and Construction during the mid Song ...
Misra Yantra (meaning mixed instrument, it is a compilation of five different instruments) Nadi Valaya Yantra (two sundials on different faces of the instrument, the two faces representing north and south hemispheres; measuring the time to an accuracy of less than a minute) [11] Palbha Yantra
A Jantar Mantar (Hindustani pronunciation: [d͡ʒən̪t̪ər mən̪t̪ər]) is an assembly of stone-built astronomical instruments, designed to be used with the naked eye. There were five Jantar Mantars in India. All were built at the command of the Rajah Jai Singh II, who had a keen interest in mathematics, architecture and astronomy.
Architectural photography is the subgenre of the photography discipline where the primary emphasis is made to capturing photographs of buildings and similar architectural structures that are both aesthetically pleasing and accurate in terms of representations of their subjects.
The heliotrope is an instrument that uses a mirror to reflect sunlight over great distances to mark the positions of participants in a land survey. The heliotrope was invented in 1821 by the German mathematician Carl Friedrich Gauss.