Pluto has been our favorite planet since 2006. The reason why I wrote this blog is because NASA is ready to explore the planet and study it closely through its mission New Horizons. So before we get to know about this mission, let’s first get to know about Pluto. HISTORY: Pluto was discovered on February 18, 1930 in the Kuiper Belt. Kuiper belt is a ring of bodies beyond Neptune. Originally Pluto was considered as the ninth planet in solar system. But studying its size, mass, density etc. the International Astronomical Unit (IAU) defined the term “planet”. The definition goes as- “ planet is a body that orbits the Sun, is massive enough for its own gravity to make it round, and has cleared its neighbourhood" of smaller objects around its orbit.” According to this definition, Pluto could not be classified as a planet and hence was reclassified as a “dwarf planet” in 2006. Although it is a dwarf planet compared to other eight planets, it is the second m...