The University of Arizona is the top ranked research university for planetary exploration with regard to citations in the scientific literature, according to an analysis on ScienceWatch.com:
Currently, the UA's Lunar and Planetary Laboratory is actively involved in five spacecraft missions: Cassini; the Phoenix Mars Lander; the HiRISE camera orbiting Mars; the MESSENGER mission to Mercury and OSIRIS-REx, the first U.S. sample return mission to an asteroid, which was just selected by NASA.