It was one day as I listened to baseball that it occurred to me how the moon actually moves, in a spiral, because while it orbits the earth it also follows the orbit of the earth around the sun. This is obvious, but the realization pleased me.
Well done, Marilynne, the text illustrates the relativity of movement perfectly. And it´s also interesting the satisfaction in understanding a phenomenon, the feeling of pieces that fit together. When Physics is getting more and more complicate and you can´t understand anything in a intuitive way, this feeling disappears.
To add a pretentious remark, I´d dare to say that the moon would trace an helix more than a spiral in its trajectory
