Which planet has the most moons?
List of natural satellites
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The earliest published discovery of a moon other than the Earth's was by Galileo Galilei, who discovered the four Galilean moons orbiting Jupiter in 1610. Over the following three centuries only a few more moons were discovered. Missions to other planets in the 1970s, most notably the Voyager 1 and 2 missions, saw a surge in the number of moons detected, and observations since the year 2000, using mostly large, ground-based optical telescopes, have discovered many more, all of which are irregular. Recent years have had a drop in the number of discovered moons, with only 14 moons – twelve of Jupiter (ten of which were announced at the same time), one of Makemake, and one of Neptune – being discovered since 2012.