Scroll right and journey [ http://pdsmaps.wr.u…] for 300 kilometers over Terra Sirenum [ http://www-pdsimage…mapmkr.htm ] in the cratered [ http://clasdean.la.…] highlands of southern Mars [ http://www.uapress.…contents.htm ]. The infrared view [ http://photojournal…PIAGenCatalogPage.pl ?PIA03483 ], 32 kilometers wide, was recently recorded by the THEMIS [ http://themis.asu.e…] camera on board the orbiting Mars Odyssey [ http://mars.jpl.nas…odyssey.html ] spacecraft. Beginning [ http://themis.asu.e…] at the north (left) edge, the scene sweeps across the floor and over the rim of Koval'sky Crater. Continuing [ http://themis.asu.e…] southward [ http://themis.asu.e…] (right) of the crater's rim are lava flows [ http://volcano.und.…Overview.html ] exhibiting fractures and numerous smaller impact craters. The infrared [ http://sirtf.caltec…gallery.html ] image was made in daylight hours, so sun-facing slopes are still warm and bright while shadowed areas are cool and dark. But rocky [ http://antwrp.gsfc.…] regions also tend to remain cooler [ http://sirtf.caltec…zoo.html ] and darker than their surroundings, likely corresponding to the dark blotchy terrain along the Koval'sky Crater floor and dark rings of rocky ejecta surrounding some of the smaller craters [ http://wwwflag.wr.u…marscrat.html ].
Explanation
Scroll right and journey [ http://pdsmaps.wr.u…] for 300 kilometers over Terra Sirenum [ http://www-pdsimage…mapmkr.htm ] in the cratered [ http://clasdean.la.…] highlands of southern Mars [ http://www.uapress.…contents.htm ]. The infrared view [ http://photojournal…PIAGenCatalogPage.pl ?PIA03483 ], 32 kilometers wide, was recently recorded by the THEMIS [ http://themis.asu.e…] camera on board the orbiting Mars Odyssey [ http://mars.jpl.nas…odyssey.html ] spacecraft. Beginning [ http://themis.asu.e…] at the north (left) edge, the scene sweeps across the floor and over the rim of Koval'sky Crater. Continuing [ http://themis.asu.e…] southward [ http://themis.asu.e…] (right) of the crater's rim are lava flows [ http://volcano.und.…Overview.html ] exhibiting fractures and numerous smaller impact craters. The infrared [ http://sirtf.caltec…gallery.html ] image was made in daylight hours, so sun-facing slopes are still warm and bright while shadowed areas are cool and dark. But rocky [ http://antwrp.gsfc.…] regions also tend to remain cooler [ http://sirtf.caltec…zoo.html ] and darker than their surroundings, likely corresponding to the dark blotchy terrain along the Koval'sky Crater floor and dark rings of rocky ejecta surrounding some of the smaller craters [ http://wwwflag.wr.u…marscrat.html ].
