sábado, 6 de mayo de 2017

MARAVILLAS MARCIANAS 4 | Colorful Equatorial Gullies in Krupac Crater | NASA

Colorful Equatorial Gullies in Krupac Crater | NASA

Colorful Equatorial 

Gullies in Krupac Crater

Gullies in Krupac Crater

Although large gullies (ravines) are concentrated at higher latitudes, there are gullies on steep slopes in equatorial regions, as seen in this image captured by NASA's Mars Reconnaissance Orbiter (MRO). An enhanced-color closeup shows part of the rim and inner slope of Krupac Crater located just 7.8 degrees south of the equator.
The colors of the gully deposits match the colors of the eroded source materials. Krupac is a relatively young impact crater, but exposes ancient bedrock. Krupac Crater also hosts some of the most impressive recurring slope lineae (RSL) on equatorial Mars outside of Valles Marineris.
Another close look shows some of RSL, flowing downhill (to the left). The RSL leave bright deposits when inactive from previous years; this year's active RSL are the thin dark lines.
The map is projected here at a scale of 25 centimeters (9.8 inches) per pixel. [The original image scale is 26.3 centimeters (10.4 inches) per pixel (with 1 x 1 binning); objects on the order of 79 centimeters (31.1 inches) across are resolved.] North is up.
The University of Arizona, Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., Boulder, Colo. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington.
Image credit: NASA/JPL-Caltech/Univ. of Arizona
Last Updated: May 5, 2017
Editor: Tony Greicius

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