Surah Ya-Sin / Verse 40

Having described signs in the sun and the moon, the Quran now draws attention to their harmonious order. Sun and moon each have an appointed course and measure. Night and day follow one another in a way that sustains the regular pattern of life.

In this context, the sun's not overtaking the moon expresses the stability of the order governing them. It does not mean that the sun and moon can never appear in the sky at the same time.

The words “each moves along in an orbit” (wa kullun fi falakin yasbahun) offer a vivid picture of the organised movement of heavenly bodies.

The immense world above us is full of motion, yet these verses do not present it as lawless or abandoned. Its enduring order invites us to recognise the power and knowledge of the One who governs it.

There is also a literary feature in the short Arabic phrase kullun fi falak. If its letters are written without vowel marks or spaces, the sequence reads the same forwards and backwards. This striking symmetry appears within a phrase speaking of the ordered movement of the heavenly bodies.

The literary observation stands on its own; it does not establish a numerical or scientific miracle.