File:Rotating earth for twilight.png

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Original file (742 × 740 pixels, file size: 26 KB, MIME type: image/png)

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This image could be re-created using vector graphics as an SVG file. This has several advantages; see Commons:Media for cleanup for more information. If an SVG form of this image is available, please upload it and afterwards replace this template with {{vector version available|new image name}}.


It is recommended to name the SVG file “Rotating earth for twilight.svg”—then the template Vector version available (or Vva) does not need the new image name parameter.
Description
English: This is an image for the purpose of illustrating the phenomenon of twilight. The circle is the Earth, seen from above North Pole. N is the North Pole. P is a grounded observer. The blue line indicates the observer's sightline if he looks towards the horizon at his east and the one at his west, and is a tangent to Earth at point P. The red arrow indicates the direction of sunlight. The solar elevation angle is 12 degree at the moment captured in this diagram. It was created using Processing.
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Author User:Dr. Greywolf

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GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.
w:en:Creative Commons
attribution share alike 		This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
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  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
This licensing tag was added to this file as part of the GFDL licensing update.

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Date/TimeThumbnailDimensionsUserComment
current04:45, 25 August 2020Thumbnail for version as of 04:45, 25 August 2020742 × 740 (26 KB)Dr. Greywolf (talk | contribs){{Information |description ={{en|1=This is an image for the purpose of illustrating twilight. N is the North Pole. P is the grounded observer. The blue line indicates what the observer can see if he looks towards the horizon at his east and the one at his west, and is a tangent to Earth at point P. The red arrow indicates the direction of sunlight. It was created using Processing.}} |date =2020-8-25 |source ={{own}} |author =User:Dr. Greywolf }} [[Category:Maps and...

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