We live at the bottom of a gravity well—a distortion in space to which things naturally fall down. We can, however, look out on the universe up towards the stars. Here we are pictured looking up to the fixed point of the north star that marks the axis of our Earth’s rotat ... Continue Reading
The fixed point theorem states that within any bounded dynamical system there will always be at least one point which remains constant from one instant to the next. For us on Earth, despite the many motions to which we are subject—the earth’s rotation, our orbit around th ... Continue Reading