Which heavenly body was discovered by astronomer Clyde W Tombaugh on 18 February 1930?
Clyde Tombaugh Clyde Tombaugh Clyde William Tombaugh (; February 4, 1906January 17, 1997) was an American astronomer. He discovered Pluto in 1930, the first object to be discovered in what would later be identified as the Kuiper belt. At the time of discovery, Pluto was considered a planet but was later controversially reclassified as a dwarf planet in 2006. Tombaugh also discovered many asteroids. He also called for the serious scientific research of unidentified flying objects, or UFOs. Tombaugh was born in Streator, Illinois, son of Muron Dealvo Tombaugh, a farmer, and his wife Adella Pearl Chritton. After his family moved to
Clyde Tombaugh that Tombaugh "... never observed an unexplainable aerial object despite his continuous and extensive observations of the sky." According to an entry in "UFO updates", Tombaugh said: "I have seen three objects in the last seven years which defied any explanation of known phenomenon, such as Venus, atmospheric optic, meteors or planes. I am a professional, highly skilled, professional astronomer. In addition I have seen three green fireballs which were unusual in behavior from normal green fireballs... I think that several reputable scientists are being unscientific in refusing to entertain the possibility of extraterrestrial origin and nature." Shortly after this