Satellite per Astronomia X. An Italian X-ray (0.1 - 200 keV) satellite, launched 30 April 1996. "Beppo" is the nickname of Giuseppe Occhialini, a pioneering high-energy physicist.

An Italian - Dutch satellite actively involved in the quest to collect gamma-ray burst data in the X-ray range of the electromagnetic spectrum. It was named after the Italian physicist Gieuseppe "Beppo" Occhialini who was instrumental in forming what is today known as the European Space Agency.

an X-ray satellite of the Italian Space Agency built with the participation of the Netherlands Agency for Aerospace Programs. It was launched in April 1996 and is still operational.