sentences:  Like many other halos, it is slightly reddish on the inner edge, facing the sun or moon, and bluish on the outer edge.The shape of the circumscribed halo is strongly dependent on the distance of the sun or moon above the horizon.Its top and bottom (i.e., the points directly below and above the sun or moon) always lie directly tangential to the 22° halo, but its left and right sides take on different shapes depending on solar (or lunar) elevation.