We've never walked in space, but we imagine the experience of weightlessness is unbelievably disorienting. When you let go of a football on the moon, the football doesn't drop to the ground and rest. It floats about from place to place. The football also doesn't float to the same place every time you drop it.
Today is floats left.
Yesterday it floated down and to the right. The inconsistency and unpredictability of behavior in outer space must be incredibly disorienting. Without proper planning, information spaces can be bewildering as well. Good information architectures orient users, rather than confuse them. Done well, information architectures take users to the information they need in a way that meets their expectations.