Stripped of its Title: Pluto Was Discovered 84 Years Ago Today; A Look at Astronomy and Time via the SIHH 2014 Exhibit: Horology, a Child of Astronomy

 |  February 18th, 2014

Exactly 84 years ago today, Pluto, long believed to be the  9th planet in our solar system, was discovered at the Lowell Observatory in Flagstaff, AZ, by astronomer Clyde W. Tombaugh —although the concept of an unknown 9th planet had been first noted and searched for by Percival Lowell a decade earlier. Then-new photographic techniques enabled Tombaugh to find the planet on February 18, 1930 and – after collaboration with other scientists – announced its existence publicly less than a month later.  Over the years, Pluto and its only known moon, Charon, have been the subject of much scientific study. In 2006, poor Pluto was stripped of its “planet” title by the International Astronomical Union, citing new rules that a…

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