George Willis Ritchey

George Willis Ritchey, born on December thirty-first, eighteen sixty-four, in Tuppers Plains, Ohio, was a distinguished American optician and astronomer. Initially educated as a furniture maker, Ritchey would go on to revolutionize the field of astronomy through his innovative work in telescope design.

Alongside Henri Chrétien, Ritchey co-invented the Ritchey–Chrétien (R–C) reflecting telescope, a design that has become the standard for both ground-based and space-based telescopes. His collaboration with George Ellery Hale at Yerkes Observatory and later at Mt. Wilson Observatory was pivotal, as he contributed significantly to the design and construction of the mirrors and mountings for the Mt. Wilson sixty-inch and one hundred-inch telescopes.

Despite a professional falling-out with Hale in nineteen nineteen, Ritchey continued to make strides in his field, promoting the construction of large telescopes in Paris before returning to America in nineteen thirty. He secured a contract to build a Ritchey-Chrétien telescope for the U.S. Naval Observatory, which remains operational at the Flagstaff Station in Arizona.

Ritchey's contributions to astronomy were recognized in nineteen twenty-four when he received the Prix Jules Janssen, the highest honor from the Société astronomique de France. His legacy is further immortalized with craters on Mars and the Moon named in his honor, reflecting his lasting impact on the field.