HiRISE: High Resolution Imaging Science Experiment http://uahirise.org Image updates from the HiRISE Camera onboard the Mars Reconnaissance Orbiter en-us webmaster@pirl.lpl.arizona.edu (The Folks at HiRISE) Wed, 16 May 2012 08:00:00 MST Sand Ripples at a Potential Landing Sitehttp://uahirise.org/ESP_026726_1790Landing of the surface of Mars requires extensive planning and imaging reconnaissance. This terrain west of Aeolis Planum is being considered as landing site for a future Mars mission. Streamlined Landforms near the Cerberus Fossaehttp://uahirise.org/ESP_026580_1940One of the earliest observations of Mars that indicated that water once flowed across its surface was the presence of large streamlined landforms. Monitoring Dune Gullieshttp://uahirise.org/ESP_026506_1300Remarkably, we have learned that the gullies form primarily or entirely during seasons when there is carbon dioxide frost on the ground.A Youthful Crater in the Cydonia Colles Regionhttp://uahirise.org/ESP_025716_2200Just what makes a Martian crater youthful, in a geologic sense? Very old craters tend to have eroded rims and can have plenty of material that's filled in the floor. HiFlyers http://www.uahirise.org/epo/hiflyers New HiFlyers for this week's release, 16 May 2012. HiSlides http://www.uahirise.org/epo/hislides New HiSlides for this week's release, 16 May 2012.