Martian highs and lows
(a) The topography of Mars as determined by the laser altimeter of the Mars Global Surveyor. The highest regions are in white and red, the lowest regions in blue. (b) Map of surface temperature, measured by the craft's infrared spectrometer. Warmest regions in red, coolest in blue. (c) A visible-wavelength image of clouds and surface markings, as seen by the Hubble Space Telescope.
(Picture credit:NASA/JPLNASA/JPL/ASU/Cornell)