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Lighting-up times were formerly commonly displayed in national and local newspapers in the UK and announced on national and local radio stations, but the widespread adoption of street lighting has rendered this largely redundant. As a result, most of the previous sources no longer provide them, but may still provide sunrise/sunset times.
The times of the rising and the setting of the upper solar limb as given in astronomical almanacs correct for this by using the more general equation cos ω ∘ = sin a − sin ϕ × sin δ cos ϕ × cos δ {\displaystyle \cos \omega _{\circ }={\dfrac {\sin a-\sin \phi \times \sin \delta }{\cos \phi \times \cos \delta }}}
Calculate the sunset time, which is the solar noon time plus the sunset hour angle in degree divided by 15; Use the sunset time as input to the solar geometry routine to get the solar azimuth angle at sunset. An interesting feature in the figure on the right is apparent hemispheric symmetry in regions where daily sunrise and sunset actually occur.
An Excel workbook with VBA functions for twilight (dawn and dusk), sunrise, solar noon, sunset, and solar position (azimuth and elevation) by Greg Pelletier, translated from NOAA's online calculator for sunrise/sunset; Time and Date to find the current state of the sun in a specified place. "Twilight" . Encyclopædia Britannica. Vol. 27 (11th ...
Time zones of the world. A time zone is an area which observes a uniform standard time for legal, commercial and social purposes. Time zones tend to follow the boundaries between countries and their subdivisions instead of strictly following longitude, because it is convenient for areas in frequent communication to keep the same time.
name = the United Kingdom Name used in the default map caption; image = United Kingdom adm location map.svg The default map image, without "Image:" or "File:" image1 = United Kingdom relief location map.jpg An alternative map image, usually a relief map, which can be displayed via the relief or AlternativeMap parameters; top = 61
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[a] [1] Scotland at 78,801 square kilometres (30,425 sq mi), is second largest, accounting for about a third of the area of the UK. [a] [1] Wales and Northern Ireland are much smaller, covering 20,783 and 14,330 square kilometres (8,024 and 5,533 sq mi) respectively. [a] [1] The area of the countries of the United Kingdom is set out in the ...