Foto sane ngasilin ngungkapin akeh busur konsentris ( kepahan saking lingkaran sempurna) ring dija pusat sane pas polih antuk mudah katurunin, miwah sane pas teken kutub Celestial, sane matongos pas ring baduur posisi kutub sane sayaktine (kaja utawi kelod) saking cakrawala.
The resulting photograph reveals a multitude of concentric arcs (portions of perfect circles) from which the exact center can be readily derived, and which corresponds to the Celestial pole, which lies directly above the position of the true pole (North or South) on the horizon.