[36-inch Refractor Telescope]

The first four satellites of Jupiter were discovered by Galileo in 1610. Edward Emerson Barnard discovered the fifth shortly after midnight on September 9, 1892. Fifth in order of discovery and third in distance from the planet, Amalthea was the last satellite to be discovered by direct observation through a telescope. After 1892, astronomers relied on photography to identify new satellites. Pictured here is the Lick Observatory's 36-inch refractor telescope used by Barnard to detect Amalthea.