ESA SP-1291 Mars Express: The Scientific Investigations
Mars Express arrived at its destination in December 2003 to investigate most of the facets of the Red Planet – the interior, surface, atmosphere and ionosphere – in unprecedented detail.
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In addition to these global studies, the unifying theme of the mission is the search for water in its various states everywhere on the planet. The resulting water inventory (so far covering water vapour and water ice) has a great significance for the search for potential life forms, past or present, on the surface and below.