Edward Emerson Barnard

Edward Emerson Barnard (December 16, 1857 – February 6, 1923) was an American astronomer. He found Amalthea, a moon of the planet Jupiter. Barnard's star and Barnard's galaxy were named after him.
Barnard made a list of dark nebulae, the "Barnard Catalogue of Dark Markings in the Sky", or the Barnard Catalogue for short. The nebulae listed by Barnard have become known as 'Barnard objects'.