Astronomy Picture of the Day
October 15, 2014

Yardangs near Memnonia Fossae (EDM)
Yardangs near Memnonia Fossae (EDM)

Credits: NASA/JPL/Arizona State University (ASU) - Credits for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/IPF

In this VIS image, which is an Extra Detail Magnification (or "EDM", for short) of a detail of a frame taken by the NASA - Mars Odyssey Orbiter on August, 24th, 2014, and during its 56.315th orbit around the Red Planet, we can see a small portion of a Region located near Memnonia Sulci whose Surface has been deeply eroded by the powerful action of two Dominant Winds, that went on and on until they formed a long series of Linear Ridges that are commonly known as "Yardangs".

The two prominent (---> main) directions of the two aforementioned Dominant Winds are - as you can see - clearly recorded by the two directions of the Ridges. which, as you may want to notice, have been, somehow, "cut" by a relatively short and shallow Channel-like Surface Depression that shows, in its smooth interior, the presence - lower right (Dx) side of the EDM - of an interesting and highly reflective, oblong-shaped, Rocky Outcrop (or, maybe, a Boulder that has been partially unearthed).

Latitude (centered): 10,4443° South
Longitude (centered): 182,4750° East
Instrument: VIS

This image (which is a crop taken from an Original Mars Odyssey Orbiter b/w and Map-Projected frame published on the NASA - Planetary Photojournal with the ID n. PIA 18743) has been additionally processed, magnified to aid the visibility of the details, contrast enhanced and sharpened, Gamma corrected and then colorized in Absolute Natural Colors (such as the colors that a normal human eye would actually perceive if someone were onboard the NASA - Mars Odyssey Orbiter and then looked down, towards the Surface of Mars), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team.

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