Fichier:Mars Viking 22e169.png

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Mars_Viking_22e169.png ‎(208 × 512 Pixel, Fichiersgréisst: 88 KB, MIME-Typ: image/png)

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Beschreiwung

Original Caption Released with NASA Image:

Photo from Viking Lander 2 shows late-winter frost on the ground on Mars around the lander. The view is southeast over the top of Lander 2, and shows patches of frost around dark rocks. The surface is reddish-brown; the dark rocks vary in size from 10 centimeters (four inches) to 76 centimeters (30 inches) in diameter. This picture was obtained September 25, 1977. The frost deposits were detected for the first time 12 Martian days (sols) earlier in a black-and-white image. Color differences between the white frost and the reddish soil confirm that we are observing frost. The Lander Imaging Team is trying to determine if frost deposits routinely form due to cold night temperatures, then disappear during the warmer daytime. Preliminary analysis, however, indicates the frost was on the ground for some time and is disappearing over many days. That suggests to scientists that the frost is not frozen carbon dioxide (dry ice) but is more likely a carbon dioxide clathrate (six parts water to one part carbon dioxide). Detailed studies of the frost formation and disappearance, in conjunction with temperature measurements from the lander’s meteorology experiment, should be able to confirm or deny that hypothesis, scientists say.
Datum 2007-07-02; original photo was taken 1977-09-25.
Quell Own work based on images in the NASA Viking image archive
Auteur "Roel van der Hoorn (Van der Hoorn)"
Autorisatioun
(Dëse Fichier nach eng Kéier benotzen)		 I used the original 22e169.blu, 22e169.grn and 22e169.red images from the NASA Viking image archive, converted them to .png, manually removed the noise, merged them into one image and finally increased the brightness and contrast with 20. Except for the conversion, this was all done in Adobe Photoshop CS2. The original files by NASA are in the public domain, and so is this new one.
Aner Versiounen I created this image as a replacement for the Viking2-PIA00573.jpg. This file was created by NASA, but the quality is not very high. Using the original pictures from the Lander archive resulted in a higher quality image.

Lizenz

Public domain Dëst Wierk gouf vu sengem Auteur, Van der Hoorn in der Wikipedia auf Englesch an de Public-Domain gesat. Dëst gëllt weltwäit.
An eenzele Länner ass dat legal net méiglech; an deem Fall:
Van der Hoorn gëtt jiddwerengem d'Recht dëst Wierk fir all Zweck ze benotzen, ouni iergendeng Konditioun, ausser de Konditiounen déi vum Gesetz verlaangt sinn.

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

Public domain Diese Datei ist gemeinfrei (public domain), da sie von der NASA erstellt worden ist. Die NASA-Urheberrechtsrichtlinie besagt, dass „NASA-Material nicht durch Urheberrecht geschützt ist, wenn es nicht anders angegeben ist“. (NASA-Urheberrechtsrichtlinie-Seite oder JPL Image Use Policy).
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aktuell17:37, 4. Jul. 2007Miniaturbild fir d'Versioun vum 17:37, 4. Jul. 2007208 × 512 (88 KB)Van der Hoorn{{Information |Description = Original Caption Released with Image: Photo from Viking Lander 2 shows late-winter frost on the ground on Mars around the lander. The view is southeast over the top of Lander 2, and shows patches of frost around dark rocks. Th

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