MARSIS below the southern polar ice cap, and extending horizontally about , the first known stable body of water on Mars. MARSIS MARSIS (Mars Advanced Radar for Subsurface and Ionosphere Sounding) is a low frequency, pulse-limited radar sounder and altimeter developed by the University of Rome La Sapienza and Alenia Spazio (today Thales Alenia Space Italy). The Italian MARSIS instrument is operational on the European Space Agency, "Mars Express" orbiter mission. The MARSIS Principal Investigator is Giovanni Picardi from the University of Rome "La Sapienza", Italy. It features ground-penetrating radar capabilities, which uses synthetic aperture techniques and a secondary receiving antenna
Antonio Sapienza Antonio Sapienza Antonio Sapienza (18 June 1794 – 1855) was an Italian composer and conductor. He was born in St. Petersburg, Russia where he began his musical studies with his father who was also called Antonio. (Antonio Sapienza Sr. (1755–1829) had emigrated from Naples to Russia in 1783 and served as a musician and voice teacher at the Russian imperial court.) At the age of 28, Sapienza left Russia for Naples to continue his musical studies at the conservatory there with Giacomo Tritto, Niccolò Antonio Zingarelli and Pietro Generali, during which time he composed two Masses, several motets and a