feb 18, 1930 - Pluto
Description:
Pluto, discovered in 1930, was the first known object in the Kuiper belt and was hailed as the ninth planet. However, its planetary status was questioned due to its smaller size. This doubts increased after the discovery of Eris in 2005. In 2006, the International Astronomical Union (IAU) redefined the term planet to exclude dwarf planets like Pluto, but many planetary astronomers still consider them planets.Added to timeline:
Date:
feb 18, 1930
Now
~ 95 years ago