“Dukhan” is the word used in Arabic for smoke, vapor and gaseous matter. It appears that the universe was a gaseous mass before it reached the state - by the will of God - from which the universe and the earth came to be.
We know that our world, the sun and the stars did not come about immediately after the primeval explosion. For the universe was in a gaseous state before the formation of the stars. This gaseous state was initially made of hydrogen and helium. Condensation and compression shaped the planets, the earth, the sun and the stars that were but products of the gaseous state. The discovery of these phenomena has been rendered possible thanks to successive findings as a result of observations and theoretical developments. The knowledge of all contemporary communities during the time of the Prophet would not suffice for the assertion that the universe had once been in a gaseous state. The Prophet himself did not claim to be the author of the statements in the Quran as it often reminded, declaring that he is simply a messenger of God.
49- This is news of the unseen which we reveal to you, which neither you nor your people knew before. So, be patient. Surely the end is for the dutiful.
11-Hud, 49