Charles Nordmann

Born on May 18, 1881, in Saint-Imier, Switzerland, he became a French astronomer and worked at the Paris Observatory. He is remembered for early experiments aimed at detecting radio waves from the Sun and for designing a photometer that helped measure the effective temperatures of stars.

Alongside his research, he built a strong reputation as a popular science author. His books and essays introduced wide audiences to astronomy, relativity, and the larger philosophical questions raised by modern science, making difficult subjects feel approachable.

During World War I, he also worked on artillery sound ranging, showing how scientific skill could be applied far beyond the observatory. He died in Paris on August 28, 1940, leaving behind both scientific contributions and a body of writing that kept astronomy close to everyday readers.