While we move on, the yellow back disappears to the rear and clears our view to the back of the blocks, which someone here at rest would see when he turns his head. Zenith and nadir indicate top and bottom of the yellow back of the block at 12 h.
The ball on top of the block at 9 h appears undistorted in contrast to the blocks which are deformed considerably.
At last the horizon begins to fill our Janus circle.
