
NASA @NASA
Pluto's "heart," a feature seen in this @NASANewHorizons image, is now named Tombaugh Regio in his honor: https://t.co/kXs2tQ0OTw — PolitiTweet.org
NASA History Office @NASAhistory
#Remembering Clyde Tombaugh on his birthday. Born #OTD in 1906, Tombaugh was an American astronomer best known for… https://t.co/jmavXzmQQi