Justin Cowart is a geologist and amateur astronomer living in Carbondale, IL. Justin has had a lifelong interest in exploring space, and one of the most fun ways to satisfy that curiosity has been looking at the images returned by space missions. His interests lie in reprocessing old data (which looks surprisingly good when it's run through modern computers!) and finding aesthetically-pleasing images that may not have gotten noticed otherwise. He can be found on Twitter as @jccwrt, and on Flickr.
Mars Express view of southern Noachis Terra on December 19, 2015. This image was made from a two color (blue/green) observation of hazes in the atmosphere. This image is largely centered on Solis Planum and the Thaumasia Plateau, a large lava plain. These regions are among the highest terrain on Mars outside of the Tharsis volcanoes. A networked cluster of fissures known as Noctis Labyrinthus is visible along the left edge of the image. These fissures form the western end of the Valles Marineris canyon system and were formed by the immense weight of the Tharsis volcanoes cracking the surface open.
Mars Express view of southern Noachis Terra on February 13, 2016. This image was made from a two color (blue/green) observation of hazes in the atmosphere. This image captures an area of the Martian southern highlands, an ancient and heavily cratered region of Mars. Several large impact craters can be seen in this image. In the foreground is the multi-ringed Lowell Crater, which measures 200 km across. A similarly sized, but heavily eroded unnamed crater can be seen at its 1 o'clock position. On the horizon sits the western rim of the 1800 km Argyre Basin, the second largest visible crater on the Martian surface.
Mars Express view of Chryse Planitia and western Arabia Terra on February 23, 2015. This image was made from a two color (blue-green) observation of hazes in the atmosphere. A seasonal dust cloud drifts above the southern edge of Chryse Planitia. Small local dust storms contributing to this dust cloud can be seen to its left. Meanwhile, the skies over western Arabia Terra and Margaritifer Terra were relatively dust-free.