THEMIS Image of the Day, August 23, 2017. This image shows the side of the large mesa at the top of the image and the southern canyon cliff face at the bottom. Materials on the floor of the chasma originated from both features. Although the cliff faces are eroding differently, both contribute to the rough floor seen in the center of the image.
Hebes Chasma is an enclosed basin near to Valles Marineris, though not connected to it. The cliff faces of the chasma itself and the interior mesa appear quite different, which may provide information on how the chasma and the mesa formed. (More on Hebes Chasma here.)
NASA’s Mars Odyssey spacecraft has spent over 15 years in orbit around Mars, circling the planet more than 69,000 times. It holds the record for longest working spacecraft at Mars. THEMIS, the IR/VIS camera system, has collected data for the entire mission and provides images covering all seasons and lighting conditions.
Over the years many features of interest have received repeated imaging, building up a suite of images covering the entire feature. From the deepest chasma to the tallest volcano, individual dunes inside craters and dune fields that encircle the north pole, channels carved by water and lava, and a variety of other feature, THEMIS has imaged them all.
For the next several months the Image of the Day will focus on the Tharsis volcanoes, the various chasmata of Valles Marineris, and the major dunes fields. We hope you enjoy these images!
More THEMIS Images of the Day by geological topic.