Seth Carlo Chandler

Seth Carlo Chandler, born on September 16, 1846, in Boston, Massachusetts, was a prominent American astronomer, geodesist, and actuary. He was the son of Seth Carlo and Mary (née Cheever) Chandler. During his final year of high school, he showcased his mathematical prowess by performing computations for Benjamin Peirce at the Harvard College Observatory, setting the stage for his future in astronomy.

After completing his education, Chandler became the assistant to Benjamin A. Gould, who was the director of the Longitude Department of the United States Coast Survey. This government agency was responsible for conducting geodetic surveys. When Gould transitioned to lead the national observatory in Argentina, Chandler shifted his career to become an actuary. Despite this change, he remained actively involved in astronomy as an amateur, maintaining his affiliation with the Harvard College Observatory.

On October 20, 1870, Chandler married Caroline Margaret Herman, and together they enjoyed a long marriage of forty-seven years, raising several daughters. Chandler's most notable contribution to science is his extensive research on what is now known as the Chandler wobble, a phenomenon related to polar motion, which he studied for nearly three decades. His work also included significant contributions to the study of variable stars, the independent co-discovery of the nova T Coronae Borealis, and advancements in the estimation of the constant of aberration, as well as the computation of orbital parameters for asteroids and comets.

Chandler's achievements were recognized with prestigious awards, including the Gold Medal of the Royal Astronomical Society in eighteen ninety-six and the James Craig Watson Medal in eighteen ninety-four. In honor of his contributions to astronomy, the crater Chandler on the Moon bears his name, ensuring that his legacy endures in the annals of scientific history.