Richard A. Proctor

Richard A. Proctor, born on March 23, 1837, was a prominent English astronomer and science communicator whose contributions to the field of astronomy are still recognized today. He is particularly noted for creating one of the earliest maps of Mars in 1867, which was based on twenty-seven drawings by the esteemed English observer William Rutter Dawes. Although his map was eventually overshadowed by the works of Giovanni Schiaparelli and Eugène Antoniadi, Proctor's efforts laid important groundwork for future Martian cartography.

In his quest to understand the Red Planet, Proctor utilized historical drawings of Mars dating back to 1666. His meticulous analysis led him to estimate the sidereal day of Mars in 1873, arriving at a figure of twenty-four hours, thirty-seven minutes, and twenty-two point seven thirteen seconds. This estimate was remarkably close to the modern value of twenty-four hours, thirty-seven minutes, and twenty-two point six sixty-three seconds, showcasing his dedication to precision in astronomical measurements.

Proctor's legacy extends beyond his mapping endeavors; the crater Proctor on Mars is named in his honor, a testament to his lasting impact on the study of the planet. His work as a writer and opinion journalist further solidified his role as a key figure in the popularization of science during his time, making complex astronomical concepts accessible to the general public.