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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…
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time dial gnomon sundials vertical shadow horizontal dials latitude sun style hour angle may north aligned plane axis equatorial used
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Sundial | is a | horological device that tells the time of day | 0.90 | text |
| Sundial | is a | mast of the Sundial Bridge at Turtle Bay in Redding | 0.90 | text |
| obelisks | instance of | and vertical gnomons | 0.80 | text |
| the analemmatic sundial | instance of | in some designs | 0.80 | text |
| the style is moved according to the month | instance of | in some designs | 0.80 | text |
| equatorial | instance of | For equiangular dials | 0.80 | text |
| spherical or Lambert dials | instance of | For equiangular dials | 0.80 | text |
| this correction can be made by rotating the dial surface by an angle equaling the difference in longitude | instance of | For equiangular dials | 0.80 | text |
| without changing the gnomon position or orientation | instance of | For equiangular dials | 0.80 | text |
| the Capuchin dial | instance of | In more sophisticated versions | 0.80 | text |
| there is only one set of hour-lines | instance of | In more sophisticated versions | 0.80 | text |
| i.e. | instance of | In more sophisticated versions | 0.80 | text |
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