Became the first woman to earn a PhD in astrophysics at Princeton University, a landmark first.
In 1975, María Teresa Ruiz became the first woman to earn a PhD in astrophysics at Princeton University. The exact day of the degree ceremony is not verified in the available sources, so the event is recorded with a year placeholder only.
This was a major historic first. Princeton was among the most prestigious academic institutions in the field, and Ruiz’s doctorate made her a visible exception to the gender barriers that had long restricted women’s access to top-tier scientific training. In the context of the 1970s, women still faced strong structural obstacles in graduate science: implicit bias, limited mentorship, and the presumption that advanced research careers were male domains. Ruiz’s achievement directly challenged those assumptions.
Her doctorate was not only a personal milestone but also a foundational moment for Chilean astronomy. It strengthened her ability to contribute to research, to train new generations of astronomers, and to help expand the scientific presence of Chile in an area where it would later become globally prominent. Later profiles consistently describe this as one of the key “firsts” that made her a pioneer for women in science in Chile and beyond.