Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q80793> ?p ?o }
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- Q80793 abstract "A sundial is a device that tells the time of day 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 across the sky, the shadow aligns with different hour-lines which are marked on the dial to indicate the time of day. The style is the time-telling edge of the gnomon, though a single point or nodus may be used. The gnomon casts a broad shadow; the shadow of the style shows the time. The gnomon may be a rod, a wire or an elaborately decorated metal casting. The style must be parallel to the axis of the Earth's rotation for the sundial to be accurate throughout the year. The style's angle from horizontal is equal to the sundial's geographical latitude. In a broader sense a sundial is any device that uses the sun's altitude and/or azimuth to show the time. In addition to their time-telling function, sundials are valued as decorative objects, as literary metaphors and as objects of mathematical study.It is common for inexpensive mass-produced decorative sundials to have incorrectly aligned gnomons and hour-lines, which cannot be adjusted to tell correct time.".
- Q80793 thumbnail Melbourne_sundial_at_Flagstaff_Gardens.JPG?width=300.
- Q80793 wikiPageExternalLink vl2.pdf.
- Q80793 wikiPageExternalLink 1408.0987.pdf.
- Q80793 wikiPageExternalLink SundialDesignConsiderations.pdf.
- Q80793 wikiPageExternalLink relojesdesol.info.
- Q80793 wikiPageExternalLink earth.php?latdegdec=50.4231&londegdec=6.2017&scale=10000&&commons=1.
- Q80793 wikiPageExternalLink sundials.html.
- Q80793 wikiPageExternalLink www.commission-cadrans-solaires.fr.
- Q80793 wikiPageExternalLink eng.
- Q80793 wikiPageExternalLink www.gnomonica.cat.
- Q80793 wikiPageExternalLink www.gnomonicaitaliana.it.
- Q80793 wikiPageExternalLink sundials.
- Q80793 wikiPageExternalLink www.sundials.org.
- Q80793 wikiPageExternalLink www.sundialsoc.org.uk.
- Q80793 wikiPageExternalLink www.sundialsofscotland.co.uk.
- Q80793 wikiPageExternalLink astronomy5.asp.
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