Pluto at 95

Happy International Pluto Day! Ninety-five years ago today, on February 18, 1930, 24-year-old Clyde Tombaugh discovered Planet Pluto while blinking between photographic plates of the sky taken on two separate nights in January of that year. The goal was to find anything that moved against the background stars between nights. That object would not be a star but a planet within our solar system. The…