Pluto is known as the dwarf planet.
Dwarf planets are heavenly bodies that are too small to be considered a planet but too large to fall under smaller categories.
- From 1930 to 2006, Pluto was classified as a planet and then later re-classified as a dwarf planet.
- Pluto was always an oddity. Pluto’s orbit was peculiar that at times it was closer to the sun than Neptune.
- Things came to light in 2003, when astronomer Michael Brown discovered Eris, an object identical in size to Pluto, in the same outer region of the solar system.
- In 2006, the IAU coined the term “dwarf planet” and applied it to both Pluto and Eris.