He is the One Who has made the sun (a source of) light and (with that) made the moon shine, and appointed for it stages (to appear smaller or bigger) so that you might compute the number of years and the count (of time). Allah has not created (all this) but with a zero-defect strategy. (Through these cosmic realities) He expounds in detail the Signs (of His Creativity, Unicity and Might) for those who possess knowledge.