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  2. Heliotrope (instrument) - Wikipedia

    en.wikipedia.org/wiki/Heliotrope_(instrument)

    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.

  3. List of astronomical instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_astronomical...

    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.

  4. History of sundials - Wikipedia

    en.wikipedia.org/wiki/History_of_sundials

    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]

  5. Jantar Mantar, Jaipur - Wikipedia

    en.wikipedia.org/wiki/Jantar_Mantar,_Jaipur

    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

  6. Site analysis - Wikipedia

    en.wikipedia.org/wiki/Site_analysis

    Site analysis is a preliminary phase of architectural and urban design processes dedicated to the study of the climatic, geographical, historical, legal, and infrastructural context of a specific site.

  7. Figure-ground diagram - Wikipedia

    en.wikipedia.org/wiki/Figure-ground_diagram

    A figure-ground diagram is a two-dimensional map of an urban space that shows the relationship between built and unbuilt space. It is used in analysis of urban design and planning . It is akin to but not the same as a Nolli map which denotes public space both within and outside buildings and also akin to a block pattern diagram that records ...

  8. Qibla observation by shadows - Wikipedia

    en.wikipedia.org/wiki/Qibla_observation_by_shadows

    The qibla is the direction of the Kaaba, a cube-shaped building at the centre of the Great Mosque of Mecca (al-Masjid al-Haram) in the Hejaz region of Saudi Arabia. [1] This direction is special in Islamic rituals and religious law because Muslims must face it during daily prayers and in other religious contexts. [2]

  9. Archaeoastronomy - Wikipedia

    en.wikipedia.org/wiki/Archaeoastronomy

    The rising Sun illuminates the inner chamber of Newgrange, Ireland, only at the winter solstice.. Archaeoastronomy (also spelled archeoastronomy) is the interdisciplinary [1] or multidisciplinary [2] study of how people in the past "have understood the phenomena in the sky, how they used these phenomena and what role the sky played in their cultures". [3]