File:Seasonal Changes in Mars' North Polar Ice Cap (opo9715b2).jpg

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Seasonal_Changes_in_Mars'_North_Polar_Ice_Cap_(opo9715b2).jpg ‎(600 × 600 pixels, file size: 69 KB, MIME type: image/jpeg)

Captions

Captions

The cap has fully retreated to it's remnant core of water-ice. This residual cap is actually almost cut into two by a large, horn-shaped canyon called Chasma Borealis which is cut deeply into the polar terrain.

Summary

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Description
English: The cap has fully retreated to it's remnant core of water-ice. This residual cap is actually almost cut into two by a large, horn-shaped canyon called Chasma Borealis which is cut deeply into the polar terrain. The HST images also reveal a curious layered terrain which is evidence of past climatic changes on Mars.The sublimation of all of the carbon dioxide has exposed the ring of dark sand dunes which encircle the North Polar Cap. Outliers of ice persist south of the polar sand sea (between the 3 o'clock and 9 o'clock positions). The bright circular features at 3, 6, and 9 o'clock are ice-filled craters.
Date 20 May 1997 (upload date)
Source Seasonal Changes in Mars' North Polar Ice Cap
Author Phil James (Univ. Toledo), Todd Clancy (Space Science Inst., Boulder, CO), Steve Lee (Univ. Colorado), and NASA/ESA
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Licensing

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Public domain This file is in the public domain because it was created by NASA and ESA. NASA Hubble material (and ESA Hubble material prior to 2009) is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA is credited as the source of the material. This license does not apply if ESA material created after 2008 or source material from other organizations is in use.
The material was created for NASA by Space Telescope Science Institute under Contract NAS5-26555, or for ESA by the Hubble European Space Agency Information Centre. Copyright statement at hubblesite.org or 2008 copyright statement at spacetelescope.org. For material created by the European Space Agency on the spacetelescope.org site since 2009, use the {{ESA-Hubble}} tag.

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current15:06, 23 June 2024Thumbnail for version as of 15:06, 23 June 2024600 × 600 (69 KB)OptimusPrimeBot (talk | contribs)#Spacemedia - Upload of https://cdn.esahubble.org/archives/images/large/opo9715b2.jpg via Commons:Spacemedia

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