The California Gold Rush begins, the Eskimo Pie is patented, Jackie Robinson is elected to the Baseball Hall of Fame, and the first Apple Macintosh goes on sale, all on this day.
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NASA
1986: Voyager 2 passes within 50,600 miles of Uranus. The probe also discovered the moons Cordelia, Ophelia, Bianca, Cressida, Desdemona, Juliet, Portia, Rosalind, Belinda, Perdita and Puck; studied the planet's unique atmosphere; and examined the Uranian ring system. It is still the only spacecraft to have visited the two outer gas giant planets Uranus and Neptune and today continues to study interstellar space in an extended mission.