“Words are the source of misunderstandings.” –Antoine de Saint-Exupéry Back in 2006,the International Astronomical Union officially defined the word “planet” for the first time, claiming that as long as something met all three of the following criteria: It was in hydrostatic equilibrium (pulled itself into a spherical/spheroidal shape under its own gravity), and It didn’t orbit…,
Source: scienceblogs.com