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Sundial

A sundial is a horological device that tells the time of day (referred to as civil time in modern usage) when direct sunlight shines by the apparent position of the Sun in the sky. In the narrowest sense of the word, it consists of a flat plate (the dial) and a gnomon, which casts a shadow onto the dial. As the Sun appears to move through the sky, the…

History & Applications

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History

16 related topics

With fixed axial gnomon

19 related topics

Unusual sundials

18 related topics

Adjustments to calculate clock time from a sundial reading

17 related topics

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Overview

Introduction

Apparent motion of the Sun

History

Functioning

In the Southern Hemisphere

Adjustments to calculate clock time from a sundial reading

With fixed axial gnomon

Movable-gnomon sundials

Altitude-based sundials

Nodus-based sundials

Multiple dials

Unusual sundials

Meridian lines

Sundial mottoes

Use as a compass

National organisations

Historical

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Map overview Semantic statistics

Sundial

Nodes183
Edges182
Triples343
Avg. degree1.99
Density0.010929
Components1

How this topic connects Entity context

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Sundial

Top relations

related to National organisations · 25
Sundial → AARS, Asociación Amigos, British Sundial SocietyCommission, BSS, Cadrans Solaires, Catalan Sundial SocietyDe Zonnewijzerkring, Catalana, CGI, Dutch Sundial Society, English, Flemish Sundial Society, France French Sundial SocietyCoordinamento, Gnomonico Italiano Archived, Gnomònica, Italian Sundial SocietyNorth American, NASS, North American Sundial SocietySocietat, Relojes, Society, Société Astronomique
related to Historical · 21
Sundial → Analemmatic, Ancient Technologies, Arabic, Archaeoastronomy, Bronze Age, Calculation, Construction, Deficiencies, Egyptian, Horizontal Sundials, Inclined Sundials, It, Maridini, Northern Black Sea Coast, Remedies, Setting Up Marble Sundials, Sibt, Small Treatise, Tables, The Book
related to history · 19
Sundial → Athens, Babylonian, BC, BCE, By, De, Egyptian, Eratosthenes, Giovanni Padovani, Giuseppe Biancani's Constructio, Kush, Ptolemy, The, The Italian, The Roman, The Tower, They, Vitruvius, Winds
related to With fixed axial gnomon · 16
Sundial → California, Earth's, For, However, If, Jaipur, Lambert, North Pole, On, Polaris, Redding, Sun, Sundial Bridge, The, This, Turtle Bay
related to In the Southern Hemisphere · 15
Sundial → Australia, Correspondingly, For, North, Northern Hemisphere, On, Perth, Scotland, See, South, Southern Hemisphere, Sundials, The, To, US
related to Universal equinoctial ring dial · 13
Sundial → As, Earth's, Europe, Gemma's, In, It, Such, Sun, Sun's, The, These, This, William Oughtred
related to Equation of time correction · 12
Sundial → Although, Earth, Earth's, For, However, In, It, On, Sun, The, Therefore, This
see also · 12
Sundial → BianchiniHorologyJantar MantarLahaina NoonMoondialNocturnal, Butterfield, GnomònicaTide, Johannes Hevelius, Palace Sundial, Qibla, Scotland, Scottish, Shadows, Societat Catalana, Water, Zero
related to Time-zone (longitude) correction · 11
Sundial → Alaska, At, China, Earth, For, However, If, Lambert, Spain, Sun, This
related to Apparent motion of the Sun · 10
Sundial → An, Earth, Northern Hemisphere, Since, Sun, Sun's, The, The Earth, The Sun's, Unlike

Important terminology Word statistics

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Important terminology

time dial gnomon sundials vertical shadow horizontal dials latitude sun style hour angle may north aligned plane axis equatorial used

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Sundialis ahorological device that tells the time of day0.90text
Sundialis amast of the Sundial Bridge at Turtle Bay in Redding0.90text
obelisksinstance ofand vertical gnomons0.80text
the analemmatic sundialinstance ofin some designs0.80text
the style is moved according to the monthinstance ofin some designs0.80text
equatorialinstance ofFor equiangular dials0.80text
spherical or Lambert dialsinstance ofFor equiangular dials0.80text
this correction can be made by rotating the dial surface by an angle equaling the difference in longitudeinstance ofFor equiangular dials0.80text
without changing the gnomon position or orientationinstance ofFor equiangular dials0.80text
the Capuchin dialinstance ofIn more sophisticated versions0.80text
there is only one set of hour-linesinstance ofIn more sophisticated versions0.80text
i.e.instance ofIn more sophisticated versions0.80text

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