Astronomy Picture of the Day
August 31, 2014

Southward's View of Endeavour Crater - Sol 3749
Southward's View of Endeavour Crater - Sol 3749

Credits: NASA/JPL-Caltech - MER Opportunity - Credits for the additional process. and color.: Dr Paolo C. Fienga/LXTT/IPF

The NASA - Mars Exploration Rover (MER) Opportunity captured this beautiful scene looking farther Southward just after completing a Southward drive, in reverse, during the 3.749th Martian Day, or Sol, of the Rover's work on Mars - Meridiani Planum Region (such as August, 10, 2014, on Earth).

The foreground of this view from the Rover's Mast-mounted Navigation Camera (or "NavCam", for short) includes the top of the Rover's Low-Gain Antenna, at lower right (Dx), and the rear portion of Opportunity's Deck, with the Sundial of a Camera Calibration Target. For scale, the largest of the Sundial's Concentric Rings has an Outer Diameter of 3,15" (inches), such as about 8,001 cm.

The Ground beyond the NASA - Mars Exploration Rover (MER) Opportunity includes some Windblown Lines of Sand; on the other hand, at the Horizon, is part of the Crest Line of the Western Ridge of Endeavour Crater. The Sol's 3749 drive covered approx. 338 feet (such as about 103,0224 meters) along the Outer Slope of the Crater's Rim. A map of the area with the Sol 3749 "endpoint" marked is available online at

This picture (which is an Original b/w Image taken by the NASA - Mars Exploration Rover (MER) - "Opportunity" on August, 10, 2014, published on the NASA - Planetary Photojournal and identified by the ID n. PIA 18598) has been additionally processed, magnified in order to help the visibility of the Landscape's details, Gamma corrected and then colorized in Absolute Natural Colors (such as the colors that a normal - meaning "in the average" - human eye would actually perceive if someone were on the Surface of Mars, near the NASA - Mars Exploration Rover (MER) Opportunity, and then looked ahead, towards the Horizon and the Sky above Endeavour Crater), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team.

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