(Images: NASA)NASA's New Horizons spacecraft is co...  ...knowledge of it is not. It was in only 1930 that Clyde Tombaugh , a 23-year old astronomer from Kansas, found it h...  ...n away in the distance (though this is disputed). Tombaugh went on to have a long and fruitful career in ast...  ...Horizons in 2006,...

Exactly 80 years ago today, the one-time ninth an...  ...nth and smallest planet, Pluto, was discovered by Clyde Tombaugh . In this time, Pluto has gone through a lot of ch...  ...ck up again with promising, and young, astronomer Clyde Tombaugh (seen above) at the lead. His job consisted of lo...  ...ome of the...