Imagine you are an alien.
You are approaching planet earth for the first time. You could totally end up approaching earth from any direction. What if you approached earth from what we call the bottom, and you see Antarctica first? You would think that our entire planet is based around this one continent!
In fact, if you camped out for a day before approaching (in case there are dangerous life forms) you would notice that the entire planet even revolves around Antartica!