The Old Farmer's Almanac daily calendar gives you quick reference for the significant events on any day throughout the year.
1930: The discovery of Pluto, the ninth planet, was officially announced on this date, which was Percival Lowell's birthday. Lowell was founder of Lowell Observatory in Flagstaff, Arizona, where Clyde W. Tombaugh discovered Pluto on February 18, 1930. (Much later, Pluto's "planet" designation changed!)
2004: For 15 minutes, Luciano Pavarotti took in bravos after the night's performance of Tosca at the Metropolitan Opera. It was his final night of staged opera; the end of a career that began 43 years earlier. It was the biggest farewell ovation at the Met since soprano Leonie Rysanek said goodbye in January 1996.