When the space shuttle's engines cut off, and you're finally in space, in orbit, weightless... I remember unstrapping from my seat, floating over to the window, and that's when I got my first view of Earth. Just a spectacular view, and a chance to see our planet as a planet.

. . . I had found the edge. The place where you unstrap all your fastenings to the earth, to what you are what you have been, where you flame out on the edge of the spheres, and the sun and moon become eclipsed and the world below is as dead and remote and without interest as if it were glazed with ice.