File:Viking Mars in violet.JPEG

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DescriptionViking Mars in violet.JPEG	English: This image is cropped from figure 144 of SP-441. This view of the Martian atmosphere and surface is taken through the Viking Orbiter violet filter to illustrate the dramatic change in the clarity of the atmosphere in the region east and northeast of the Argyre basin during winter in the southern hemisphere. The image is taken just after the winter solstice when solar heating is minimal.
Date	1 April 2013, 13:30:07
Source	NASA SP-441: VIKING ORBITER VIEWS OF MARS, url=http://history.nasa.gov/SP-441/ch12.htm.
Author	M.H. Carr, W.A. Baum, K.R. Blasius, G.A. Briggs, J.A. Cutts, T.C. Duxbury, R. Greeley, J. Guest, H. Masursky, B.A. Smith, L.A. Soderblom, J. Veverka, J.B. Wellman

	This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

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current	20:36, 1 April 2013		239 × 242 (18 KB)	Marshallsumter (talk \| contribs)	User created page with UploadWizard

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