Mars Photography By Mars Reconnaissance Orbiter

Mission objectives
MRO science operations were initially scheduled to last two Earth years, from November 2006 to November 2008. One of the mission's main goals is to map the Martian landscape with its high-resolution cameras in order to choose landing sites for future surface missions. The MRO played an important role in choosing the landing site of the Phoenix Lander, which explored the Martian Arctic in Green Valley. The initial site chosen by scientists was imaged with the HiRISE camera and found to be littered with boulders. After analysis with HiRISE and the Mars Odyssey's THEMIS a new site was chosen. Mars Science Laboratory, a highly maneuverable rover, also had its landing site inspected. The MRO provided critical navigation data during their landings and acts as a telecommunications relay.
MRO is using its onboard scientific equipment to study the Martian climate, weather, atmosphere, and geology, and to search for signs of liquid water in the polar caps and underground. In addition, MRO is looking for the remains of the previously lost Mars Polar Lander and Beagle 2 spacecraft. After its main science operations are completed, the probe's extended mission is to be the communication and navigation system for landers and rover probes.