NASA @NASA
Seen in these images from @NASANewHorizons' 2015 flyby, Pluto’s “heart” is named Tombaugh Regio in honor of American astronomer Clyde Tombaugh (1906-1997). Tombaugh discovered Pluto in 1930. https://t.co/pyouvTtsTA — PolitiTweet.org
NASA History Office @NASAhistory
#Remembering Clyde Tombaugh on his birthday! Born near Streator Illinois in 1906,Tombaugh discovered Pluto in 1930.… https://t.co/X5k5wZhe70