How to Define a Planet
During technological evolution, our idea about the Solar System has been also greatly evolved. Technological progress enables us to discover new planets, which makes a lot of confusion among scientists in the past. Introducing a category of ‘dwarf planets’, a new order of our Solar System was established. However, scientists continue their debate about this classification, and The International Astronomical Union (IAU) tries for the first time to define scientifically what objects can be classified as the planet, and which cannot.