Surat Yunus (5-6)

{هُوَ الَّذِي جَعَلَ الشَّمْسَ ضِيَاء وَالْقَمَرَ نُوراً وَقَدَّرَهُ مَنَازِلَ لِتَعْلَمُواْ عَدَدَ السِّنِينَ وَالْحِسَابَ مَا خَلَقَ اللّهُ ذَلِكَ إِلاَّ بِالْحَقِّ يُفَصِّلُ الآيَاتِ لِقَوْمٍ يَعْلَمُونَ} (يونس : 5)

5- He is the true Creator, the Able and the Great, who made the sun a light and a ray that gives heat and light while it is a huge star and a flaming mass. He also made the moon a ray and a light without heat, and its light is reversed from the light of the sun. The moon was created in orbits that are only known to astronomers so that you would know the number of days, months, and years by the movement of the sun and the moon, and to know the seasons of cultivation and the calculations of your transactions and their terms besides many other benefits. Allah created all these for a great wisdom and confirmed interests. Allah explains these signs and proofs to wise people who know the wisdom behind Allah's Creation and who use  these signs and proofs to prove the existence and wisdom of Allah.

{إِنَّ فِي اخْتِلاَفِ اللَّيْلِ وَالنَّهَارِ وَمَا خَلَقَ اللّهُ فِي السَّمَاوَاتِ وَالأَرْضِ لآيَاتٍ لِّقَوْمٍ يَتَّقُونَ} (يونس : 6)

6- The alternation of night and day is done by the coming and going of both of them alternatively according to the sunrise and set. The creation of the heavens, the earth, and the different kinds of animals, plants, and inanimate is a sign for the believer and the unbeliever and all these signs prove the existence, oneness, the power, and the wisdom of Allah for those who ponder over and those who fear the reckoning and punishment.