John Herschel

British astronomer Sir John Frederick William Herschel, son of William Herschel, brother of Caroline Herschel, cataloged nearly two thousand more deep-sky objects and conducted notable research on light, photography, and astrophysics.

This English mathematician, chemist, experimental photographer, and inventor in some years also worked valuably on botany. The son of Mary Baldwin Herschel, he fathered 12 children.

Herschel originated the use of the Julian day system in astronomy. He named seven moons of Saturn and four moons of Uranus. He made many contributions to the science of photography, and investigated colorblindness and the chemical power of ultraviolet rays.

https://en.wikipedia.org/wiki/John_He...