File:PIA20237 Hyperboreae Undae.jpg

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Summary

DescriptionPIA20237 Hyperboreae Undae.jpg	English: Hyperboreae_Undae Today's VIS image shows part of Hyperboreae Undae, a dune field located between the north polar cap and Escorial Crater. This image was taken during northern spring and the dunes still have significant surface frost. The dunes "darken" with time as the frost sublimates from solar heating and the dark sands are revealed.
Source	https://photojournal.jpl.nasa.gov/jpeg/PIA20237.jpg https://www.jpl.nasa.gov/spaceimages/details.php?id=PIA20237
Author	NASA

Licensing

	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."

Original upload log

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Date/Time	Dimensions	User	Comment
2017-08-27 05:16	2437×1104× (851758 bytes)	Dr.K.	{{Information \|Description = Hyperboreae_Undae Today's VIS image shows part of Hyperboreae Undae, a dune field located between the north polar cap and Escorial Crater. This image was taken during northern spring and the dunes still have significant...

File history

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	05:21, 19 August 2018		2,437 × 1,104 (832 KB)	JCPagc2015	Transferred from en.wikipedia via #commonshelper

File usage

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Hyperboreae Undae

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Usage on zh.wikipedia.org
- 极北沙丘群

Metadata

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Date and time of data generation	01:11, 27 August 2017
Orientation	Normal
Software used	Windows Photo Editor 10.0.10011.16384
File change date and time	01:13, 27 August 2017
Date and time of digitizing	01:11, 27 August 2017
DateTimeOriginal subseconds	00
DateTimeDigitized subseconds	00
Color space	sRGB