Galileo spots some of Jupiter's moons, the Harlem Globetrotters play their first game, Truman announces the development of the H-bomb, and President Clinton's impeachment trial begins, all on this day.
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NASA
1610: Galileo Galilei makes his first observation of the four Galilean moons (the four largest satellites of Jupiter: Ganymede, Callisto, Io and Europa), although he is not able distinguish the last two until the following day.
Jewel, who celebrates her 39th birthday on May 23, is just one of several celebrities who go by one name. In honor of the singing star, take a look at other stars who are too big for a last name.