File:Angulo orto ocaso.svg
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editDescriptionAngulo orto ocaso.svg |
Galego: Efecto da refracción atmosférica perante o orto/ocaso solares no planeta Terra. US Navy Twilight time calculator: "For computational purposes, sunrise or sunset is defined to occur when the geometric zenith distance of center of the Sun is 90.8333 degrees. That is, the center of the Sun is geometrically 50 arcminutes below a horizontal plane. For an observer at sea level with a level, unobstructed horizon, under average atmospheric conditions, the upper limb of the Sun will then appear to be tangent to the horizon. The 50-arcminute geometric depression of the Sun's center used for the computations is obtained by adding the average apparent radius of the Sun (16 arcminutes) to the average amount of atmospheric refraction at the horizon (34 arcminutes)." |
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Date | 8/01/2012 | ||
Source | File:Sunrise-Sunset angle.svg | ||
Author | User:TWCarlson | ||
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I, the copyright holder of this work, hereby publish it under the following licenses: This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:56, 8 January 2012 | 1,017 × 518 (71 KB) | Suarez ruibal (talk | contribs) | corrección texto | |
19:49, 8 January 2012 | 1,017 × 518 (71 KB) | Suarez ruibal (talk | contribs) | representa o efecto da refracción atmosférica perante o orto/ocaso solares no planeta Terra. US Navy Twilight time calculator: "For computational purposes, sunrise or sunset is defined to occur when the geometric zenith distance of center of the Sun is |
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