deaths
Clyde Tombaugh, American astronomer and academic, discovered Pluto (born 1906)
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Clyde Tombaugh
American astronomer (1906–1997)
Clyde William Tombaugh was an American astronomer and telescope maker, best known for discovering Pluto in 1930, marking the first detection of what would eventually be recognized as the Kuiper belt. At the time, Pluto was referred to as the ninth planet in the Solar System, a…Source: Wikipedia (CC BY-SA)
Pluto
Dwarf planet
Pluto is a dwarf planet in the Kuiper belt, a ring of bodies beyond the orbit of Neptune. It is the ninth-largest and tenth-most-massive known object to directly orbit the Sun. It is the largest known trans-Neptunian object by volume by a small margin, but is less massive than…Source: Wikipedia (CC BY-SA)