Edited Mars Reconnaissance Orbiter image of gullies and slopes being monitored for changes. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of exposed layers in deposits in the far north of Mars.

Edited Mars Reconnaissance Orbiter image of a section of bedrock on Mars along with hills and sand dunes. Processing variant.

Edited Mars Reconnaissance Orbiter image of an oblong impact crater in Terra Cimmeria. Context view with annotation from NASA.

Edited Mars Reconnaissance Orbiter image of lava flows near the top of Ascraeus Mons. Color variant.

Edited Mars Reconnaissance Orbiter image of "dune convoys in West Olympia Undae.

Edited Mars Reconnaissance Orbiter image of a basin with light-toned rocks and a network of valleys. Color variant.

Edited Mars Reconnaissance Orbiter image of "colorful" Hargraves Crater on Mars. The available RGB image looked kind of greenish to me and the processed variant looks bluish so I suppose that qualifies for "colorful"... Color variant.

Edited Mars Reconnaissance Orbiter image of a linear valley filled in by sand and rocks.

Edited Mars Reconnaissance Orbiter image of the bedform of Stokes Crater.

Edited Mars Reconnaissance Orbiter of slope monitoring on Ganges Mensa.

Edited Mars Reconnaissance Orbiter image of sand dunes and mesas in Iani Chaos on Mars.

Edited Mars Reconnaissance Orbiter image of raised, circular features in Tantalus Fossae on Mars.

Edited Mars Reconnaissance Orbiter image of defrosting teardrop-shaped dunes.

Edited Mars Reconnaissance Orbiter image of layered bedrock on a crater's floor on Mars.

Edited Mars Reconnaissance Orbiter image of sand dunes with furrows on Mars.

Edited Mars Reconnaissance Orbiter image of a crater floor on Mars.

Edited Mars Reconnaissance Orbiter image of an area of Mars being searches for salts. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of a fresh crater near Sirenum Fossae.

Edited Mars Reconnaissance Orbiter image of sand dunes with "interesting" fans. Plus, it appears as if clouds are hanging over the region.

Kaleidoscopic version of a Mars Reconnaissance Orbiter image of the surface of Mars.

Edited Mars Reconnaissance Orbiter image of the residual south polar ice cap. Processing variant.

Edited Mars Reconnaissance Orbiter image of a volcanic vent on a volcano on Mars. Processing variant.

Edited Mars Reconnaissance Orbiter image of a subtly-colored region of Mars. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of the north Hellas Region. Color variant.

Edited Mars Reconnaissance Orbiter image of sand dunes in Melas Chasma.

Edited Mars Reconnaissance Orbiter image of the floor of part of eastern Aram Chaos. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of strange-looking terrain on Mars.

Edited Mars Reconnaissance Orbiter image of deposits of sediment in Ladon Basin on Mars.

Edited Mars Reconnaissance Orbiter image of clay-sulfate deposits in Terra Sirenum.

Edited Mars Reconnaissance Orbiter image of Martian north polar Barchan sand dunes.

Edited Mars Reconnaissance Orbiter image of frost on the sides of sand dunes in Moni Crater on Mars. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of gullies and landforms near Newton Crater. Context image.

Edited Mars Reconnaissance Orbiter Image of a possible landing site for the Mars 2020 mission in Gusev Crater, where Spirit landed in 2004. I suppose on reason to go to the same crater is to treat Spirit as a pathfinder for all of the interesting things the Mars 2020 rover would look at (and hopefully not get in stuck in the sand the same way Spirit did).

Edited Mars Reconnaissance Orbiter image of "dune convoys in West Olympia Undae. Processing variant.

Edited Mars Reconnaissance Orbiter image of sand on the floor of Pasteur Crater.

Edited Mars Reconnaissance Orbiter image of shallow valleys in Tyrrhena Terra on Mars.

Edited Mars Reconnaissance Orbiter image of chaos terrain on Mars.

Edited Mars Reconnaissance Orbiter image of sand dunes names Kohlar. Color variant.

El Cometa Siding Spring tiene un núcleo menor al pensado, según las imágenes de alta resolución captadas por la nave Mars Reconnaissance Orbiter (MRO), de la NASA.

Según informó Jet Propulsion Laboratory, de la NASA, el núcleo del Cometa Siding Spring tiene unos 500 metros de diámetro, o un cuar...

notaspampeanas.com/site/cometa-siding-spring-tiene-un-nuc...

Edited Mars Reconnaissance Orbiter image of a well-preserved crater with a nice central uplift. Color variant.

Edited Mars Reconnaissance Orbiter image of rock falls (into a large fissure) in Cerberus Fossae on Mars.

Edited Mars Reconnaissance Orbiter image of a crater on Mars whose slopes are being monitored (for land slides and the like).

Edited Mars Reconnaissance Orbiter image of part of Mawrth Vallis. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of an ice-filled crater.

Edited Mars Reconnaissance Orbiter image of activity in a crater (most likely due to wind) north of Antoniadi Crater on Mars. Color/processing variant.

Edited Mars Reconnaissance Orbiter PR image of sand dunes in the center of Juventae Chasma. Color/processing variant.

Original caption: The ultimate origin of the sediment that forms Martian dunes has long been debated. While sand dunes on Earth are primarily sourced by quartz-bearing components of granitic continental crust, it's often suggested that sand on Mars derives from eroded volcanic flows or sedimentary deposits, but exact sources are often vague.

This image reveals a unique situation where this small dune field occurs along the summit of the large 1-mile-tall mound near the center of Juventae Chasma. The layered mound slopes are far too steep for dunes to climb, and bedform sand is unlikely to come from purely airborne material. Instead, the mound's summit displays several dark-toned, mantled deposits that are adjacent to the dunes and appear to be eroding into fans of sandy material.

Along with local HiRISE images, spectral data from other instruments on MRO have confirmed such units are likely to be the sand source for these mound summit dunes and reveal how landscape evolution on Mars might occur.

The map is projected here at a scale of 25 centimeters (9.8 inches) per pixel. [The original image scale is 27.8 centimeters (10.9 inches) per pixel (with 1 x 1 binning); objects on the order of 83 centimeters (32.7 inches) across are resolved.] North is up.

The University of Arizona, Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., Boulder, Colorado. 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

Image Addition Date:

2018-10-01

Edited Mars Reconnaissance Orbiter image of a filled-in channel and an infilled (using NASA's terminology) crater near Quenisset Crater on Mars.

Edited Mars Reconnaissance Orbiter image of sand dunes and bedrock on Mars.

Edited Mars Reconnaissance Orbiter image of a rocky region with a steep cliff with sand dunes in the basin. The website said this reminded NASA of waves on an ocean beating against the cliff. (They are not usually so poetic...)