6-sphere coordinates are a way of thinking about 3-dimensional space in a different way. Instead of thinking of places in 3-D space using x, y and z (kind of like latitude and longitude for a map), you can use 6-sphere coordinates to think of it as 6 different circles (instead of 2 in latitude and longitude). Each circle can have a different number from 0 to 360 that tells you how far around the circle you are. That makes it easy to know where you are, just like latitude and longitude do.