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File:Mars Viking 12a240.png

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原始文件 （999 × 512像素，文件大小：188 KB，MIME类型：image/png）

摘要

描述 Viking 1 lander image of a martian sunset over Chryse Planitia. In this image the sun is 2 degrees below the local horizon. The banding in the sky is an artifact produced by the incremental brightness levels of the camera. This image was taken on the 30th martian day (sol) after touchdown, at 19:13 local time (10:40:31 on 20 August 1976 (UTC)). The camera is pointing towards the southwest.
日期 2009-01-24; original photos were taken 1976-08-20.
来源 Own work based on images in the NASA Viking image archive
作者 "Roel van der Hoorn (Van der Hoorn)"
授权
(二次使用本文件)		 I used the original 12a240.blu, 12a240.grn and 12a240.red images from the NASA Viking image archive, converted them to .png, manually removed the noise, merged them into one image (almost matching true color; see here for the channel mixing process) and finally increased the brightness with 35. Except for the conversion, this was done in Adobe Photoshop CS2. The original file by NASA is in the public domain, and so is this new one.
其他版本 I created this image as a replacement for the image Viking sunset.jpg (see also here). This file was created by NASA, but the quality was not very high. Using the original pictures from the Lander archive resulted in a higher quality image.

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Public domain 本作品已被作者英语维基百科的Van der Hoorn释出到公有领域。这适用于全世界。
在一些国家这可能不合法；如果是这样的话，那么：
Van der Hoorn无条件地授予任何人以任何目的使用本作品的权利，除非这些条件是法律规定所必需的。

The image is based on an original image from NASA to which the following copyright statement is applicable:

Public domain 本文件完全由NASA创作，在美国属于公有领域。根据NASA的版权方针，NASA的材料除非另有声明否则不受版权保护。（参见Template:PD-USGov/zh、NASA版权方针页面或JPL图片使用方针。）
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当前2009年1月24日 (六) 16:442009年1月24日 (六) 16:44版本的缩略图999 × 512（188 KB）Van der Hoorn== Summary == {{Information |Description = Viking 1 lander image of a martian sunset over Chryse Planitia. In this image the sun is 2 degrees below the local horizon. The banding in the sky is an artifact produced by the incremental brightness levels of t

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