Astronomy Picture of the Day
October 28, 2014

A small section of Sirenum Fossae
A small section of Sirenum Fossae

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, taken by the NASA - Mars Odyssey Orbiter on September, 8th, 2014, and during its 56.490th orbit around the Red Planet, we can see that the small section of a Graben (---> such as a Fault-bounded Block of Material) cutting through a Plateau with highly irregular Edges. This specific Graben is part of Sirenum Fossae (---> a long Trough found in the Memnonia Quadrangle of Mars, and located at 34,9° South Latitude and 160,9° West Longitude). Sirenum Fossae is approx. 2.735 Km (such as about 1698,435 miles) long and it was so named after a so-called "Classical Albedo Feature".

Troughs like this one, on Mars, are often also called Fossae, and Sirenum Fossae is believed to have formed by a movement of the Crust which occurred along a pair of Faults, thus causing their center section to drop down (---> sink).

Latitude (centered): 39,4375° South
Longitude (centered): 179,3030° 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 18760) 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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