Overview

• UNAM announced that Julieta Norma Fierro Gossman died on September 19, 2025 at age 77, and no cause of death was disclosed.
• Condolences poured in from UNAM, the Academia Mexicana de la Lengua and President Claudia Sheinbaum, with Mexico City’s Clara Brugada praising her impact.
• Fierro was a longtime investigator at UNAM’s Instituto de Astronomía and a professor in the Facultad de Ciencias, with research spanning interstellar matter and the Solar System.
• She led UNAM’s science outreach as Director General de Divulgación de la Ciencia and director of the Universum museum, publishing more than 40 popular science books and working in radio, TV and exhibitions.
• Her honors included UNESCO’s Kalinga Prize, the Mario Molina medal, SNI Level III status, the Silla XXV in the Academia Mexicana de la Lengua and multiple doctorates honoris causa.