View down the long-foreshortened tube, which pulls away from the searching eye, changing its perspective variables to show itself as a shorter shape rotating in front of us. We get a momentary glance through this gizmo, before it softly twirls around in an attempt to present us with a view through the other end. The round edge of the telescope will, without any contradiction at all, connect to the square frame of the screen.     I looked in one end of its tube, and then the other, and started to search for the missing planet.