File:PIA15295 Bridges 2-br2.gif
From Wikimedia Commons, the free media repository
Jump to navigation
Jump to search
Size of this preview: 800 × 557 pixels. Other resolutions: 320 × 223 pixels | 640 × 446 pixels | 1,024 × 713 pixels.
Original file (1,024 × 713 pixels, file size: 923 KB, MIME type: image/gif, looped, 2 frames, 1.0 s)
File information
Structured data
Captions
Summary[edit]
DescriptionPIA15295 Bridges 2-br2.gif |
English: Advancing Dune in Nili Patera, Mars. Back-and-forth blinking of this two-image animation shows movement of a sand dune on Mars. This discovery shows that entire dunes as thick as 200 feet (61 meters) are moving as coherent units across the Martian landscape. The sand dunes move at about the same flux (volume per time) dunes in Antarctica. This was unexpected because of the thin air and the winds which are weaker than Earth winds. It may be due to "saltation" - balistic movement of sand grains which travel further in the weaker Mars gravity. The lee fronts of the dunes in this region move on average 0.5 meters per years (though the selection may be biased here as they only measured dunes with clear lee edges to measure) and the ripples move on average 0.1 meters per year. [1]. |
Date | |
Source | http://mars.jpl.nasa.gov/mro/news/whatsnew/index.cfm?FuseAction=ShowNews&NewsID=1220 |
Author | NASA / JPL |
Licensing[edit]
Public domainPublic domainfalsefalse |
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:
|
- ↑ (2012). "Earth-like sand fluxes on Mars". Nature 485 (7398): 339–342. DOI:10.1038/nature11022. ISSN 0028-0836.[dead link]
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 15:43, 15 April 2015 | 1,024 × 713 (923 KB) | Robertinventor (talk | contribs) | User created page with UploadWizard |
You cannot overwrite this file.
File usage on Commons
File usage on other wikis
The following other wikis use this file:
- Usage on en.wikipedia.org
Hidden categories: