Finding Pluto—the hunt for Planet X
Friday, July 17, 2015 - 06:30
in Astronomy & Space
Our solar system's shadowy ninth (dwarf) planet was the subject of furious speculation and a frantic search for almost a century before it was finally discovered by Clyde Tombaugh in 1930. And remarkably, Pluto's reality was deduced using a heady array of reasoning, observation and no small amount of imagination.