File:Marsdunes mgs big.gif

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Description

Sand dunes on Mars can appear exotic. The dark dunes above might be compared to shark's teeth or chocolate confections. In reality, they arise from the complex relationship between the sandy surface and high winds on Mars. These particular dunes are located in Proctor Crater, a 170 kilometer wide crater first seen to house sand dunes by Mariner 9 more than 25 years ago. The above picture was taken by Mars Global Surveyor (MGS), a robot spacecraft currently in orbit around Mars. MGS has recently completed a primary goal of taking and transmitting detailed survey images of the red planet over an entire Martian year (669 Earth days). MGS will now be deployed to study particularly interesting regions of Mars in more detail.

Date

2001 February 26 (APOD)

Source

http://antwrp.gsfc.nasa.gov/apod/ap010226.html

Author

Malin Space Science Systems, MGS, JPL, NASA

Permission
(Reusing this file)

	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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	Date/Time	Thumbnail	Dimensions	User	Comment
current	17:28, 13 August 2007		418 × 1,011 (408 KB)	Holly Cheng	{{Information \|Description=Sand dunes on Mars \|Source=http://antwrp.gsfc.nasa.gov/apod/ap010226.html \|Date=2001 February 26 (APOD) \|Author=Malin Space Science Systems, MGS, JPL, NASA \|Permission={{PD-USGov-NASA}} }} Category:Sand Category:Mars

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File:Marsdunes mgs big.gif

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copyright status

public domain

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2001

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