events
While studying photographs taken in January, Clyde Tombaugh discovers Pluto.
Related Wikipedia articles
January
1st month in the Julian and Gregorian calendars
January is the first month of the year in the Julian and Gregorian calendars. Its length is 31 days. The first day of the month is known as New Year's Day. It is, on average, the coldest month of the year within most of the Northern Hemisphere and the warmest month of the year…Source: Wikipedia (CC BY-SA)
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)