Comment Re:Classification (Score 3, Informative) 219
There are "planets". 8 of them.
Then, there are a bunch of "dwarf planets" - Pluto, Ceres, Eris, etc.
"Minor planets" - there are thousands, millions, I'm not sure, but a lot of these.
"Exoplanets", let's divide these into two categories - system exoplanets, that orbit a star like our planets, dwarf planets, and minor planets, and systemless exoplanets that do not orbit a star.
These are all different kinds of planet. In astronomical terminology, the word "planet" by itself is reserved for the Big Eight, but all these other things are a kind of planet.