Barnard moved to California in 1887 to inaugurate the new observatory at Mount Hamilton near San Jose. He discovered the first non-Galilean moon of Jupiter, Amalthea, in September 1892 over 275 years after Galileo's discoveries. Observatory staff…
While at Lick Observatory, Barnard was the first astronomer to discover a comet using photgraphic plates. In 1889, he became the first astronomer to observe the eclipse of Saturn's satellite Iapetus.