John Brashear was an American astronomer and telescope maker, born on November 24, 1840, in Pennsylvania. He is best known for his work in optics and for founding the Brashear Company, which produced high-quality telescopes and astronomical instruments. His contributions significantly advanced the field of astronomy during the late 19th and early 20th centuries. In addition to his work in optics, Brashear was also an advocate for science education. He played a key role in establishing the Pittsburgh Astronomical Society and was involved in various educational initiatives. His legacy continues to influence both amateur and professional astronomers today.