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Posted by Jonathan Silverlight on October 24, 2006, 6:30 pm
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>-> The famous 'face' - actually a remnant massif - was first observed in a
>-> photo taken on 25 July 1976 by the American Viking 1 orbiter. Shortly
>-> afterwards, a NASA press release said the formation "resembles a human
>-> head." At the time, NASA scientists had already correctly interpreted
>-> the image as an optical illusion caused by the illumination angle of
>-> the
>-> Sun, the formation's surface morphology and the resulting shadows,
>-> giving the impression of eyes, nose and mouth. The new HRSC images
>-> confirm again the natural origin of this geological feature.
>
>It would be amusing, and perfectly practicable, to make a 3D model of
>this part of the Martian surface, and to illuminate and observe it so
>as to reproduce the "face" illusion.
>
I seem to have missed a posting! NTL apparently stopped carrying
sci.astro some time ago - time to change ISPs again.
The DLR site has various formats and sizes up to 195MB
<http://www.dlr.de/mars-express/en/desktopdefault.aspx/tabid-388/421_read
-5189/>
Unfortunately they don't say if the pictures have vertical scale
exaggeration.
I wonder if they have any plans to release the DEM or similar data set
so we can all play :-)
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