Astronomy Picture of the Day
September 21, 2012

Pollack Crater
Pollack Crater

Credits: ESA/ DLR/ FU Berlin (G. Neukum) - Credits for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/IPF

Pollack Crater is located in the "Sinus Sabaeus Quadrangle!" of Mars, at approx. 7,9° South Latitude and 334,8° West Longitude; its is about 96 Km in diameter and it was named after Dr James B. Pollack, an American Physicist (1938 –1994). Pollack Crater is a quite famous Martian Impact Crater because of a small oddity that characterizes its Floor: as a matter of fact, it contains a large Light-toned Deposit (known as "White Rock" or "Pollack's White Fingers") that was once thought to be a Salt Deposit. Truth is that nobody knows, so far, the real nature of White Rock and the reason of its bright color, even though some people - Scientists and Professional Researchers - believa that White Rock "only APPEARS white, but it is not", and the reason why of this appearence is in the fact that its surroundings are exceptionally dark. Well, said that, we honestly think, as Italian Planetary Foudation, that the aforementioned "theory" is something incredibly lame which does not even deserve to ba called and known as a "theory" at all.

This frame (which is a crop from the Original ESA - Mars Express b/w frame n. H1201_0001_ND3) has been additionally processed and then colorized, according to an informed speculation carried out by Dr Paolo C. Fienga (LXTT-IPF), in Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the ESA - Mars Express Orbiter and then looked down, towards the Surface of Mars and the Impact Crater Pollack), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team. Different colors, as well as different shades of the same color, mean, among others, the existence of different Elements present on the Surface of Mars and inside Pollack Crater, each having a different Albedo (---> Reflectivity) and Chemical Composition.

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