From 1759, she worked on astronomical ephemerides, including the Academy’s <em>Connaissance des temps</em>, used by astronomers and navigators.
Beginning in 1759, Nicole-Reine Lepaute contributed to astronomical ephemerides for the Academy of Sciences, including the long-running publication La Connaissance des Temps. These tables were essential reference tools for astronomers, navigators, and scholars who needed reliable predictions of celestial positions and events.
This work was historically significant because ephemerides were among the most technically demanding and practically useful products of eighteenth-century astronomy. Preparing them required detailed calculations of the Sun, Moon, planets, eclipses, and transits. Lepaute’s involvement shows that she was trusted with data used beyond the academy itself, reaching into navigation and timekeeping. Her calculations were not decorative; they supported real scientific and maritime needs.
The context also reveals the barriers she overcame. Women rarely held official scientific posts, and even when they performed advanced computational work, their names were often omitted or minimized. Lepaute’s association with La Connaissance des Temps demonstrates that she managed to contribute to one of the most important astronomical publications of her day. Her labor helped sustain the practical infrastructure of Enlightenment science and strengthened her reputation as a reliable and highly skilled calculator.