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Artistic impression of the Mars Express spacecraft probing the southern hemisphere of Mars. A radar cross section of the southern polar layered deposits is shown as a detail. The radar cross section has been tilted 90°. The rightmost white line is the surface radar echo, while the light blue spots along the basal radar echo highlight areas of very high reflectivity, interpreted as being caused by the presence of water. | ESA, INAF. Graphic rendering by Davide Coero Borga, Media INAF
Space

A 12-Mile-Wide Body of Water May Lie Below the South Pole of Mars

New radar observations show a potentially massive source of liquid water below the southern ice cap of Mars.

Published On 07/25/2018
2:56 PM EDT
Color mosaic of a portion of Planum Australe, in which the study area is highlighted using a THEMIS IR image mosaic. Subsurface echo power is color coded and deep blue corresponds to the strongest reflections, which are interpreted as being caused by the presence of water. | USGS Astrogeology Science Center, Arizona State University, INAF