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 Salve regina. He remained in Italy for six years and composed three operas for the Neapolitan theatres which were well-received in their day. According to the "Allgemeine musikalische Zeitung", he was also one of the several composers who produced the dramatic cantata, "La fondazione di Partenope", performed at the Teatro San Carlo on 12 January 1824 to celebrate the birthday of King Ferdinand I of the Two Sicilies. Sapienza returned to St. Petersburg in 1828 where he served as choir master and conductor at the Imperial Theatre until his death in 1855. Antonio Sapienza Antonio Sapienza (18 June 1794 –