Universe & space

Discovery of Amalthea

9 September 1892

Amalthea is an irregular, reddish moon of Jupiter, the fifth to be discovered. It was found by the American astronomer Edward Emerson Barnard using the large refracting telescope at Lick Observatory in California. It remains the last moon of any planet to have been discovered by direct visual observation through a telescope instead of by photography or spacecraft. Amalthea orbits close to Jupiter, inside the orbits of the Galilean moons, and is thought to produce dust that feeds Jupiter's faint gossamer rings. The Voyager probes and especially the Galileo spacecraft gave better views of its elongated, cratered surface.

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This moment belongs to the Industrial era (1760 CE to 1914 CE), steam, factories and revolutions. You can also browse everything in the 19th century.