The Big Bang theory showed that in the beginning all the objects in the universe were of one piece and then were parted. This fact, which was revealed by the Big Bang theory was stated in the Quran 14 centuries ago, when people had a very limited knowledge about the universe; Allah says:
"Have those who disbelieved not considered that the heavens and the earth were a joined entity, and We separated them and made from water every living thing? Then will they not believe?" [Quran 21:30]
As stated in the verse, everything, even the 'heavens and the earth' that were not yet created, were created with a Big Bang out of a single point, and shaped the present universe by being parted from each other.
When we compare the statements in the verse with the Big Bang theory, we see that they fully agree with each other. However, the Big Bang was introduced as a scientific theory only in the 20th century.
The expansion of the universe is one of the most important pieces of evidence that the universe was created out of nothing. Although this fact was not discovered by science until the 20th century, Allaah has informed us of this reality in the Quran (revealed 1,400 years ago) saying (what means):
" And the heaven We constructed with strength, and indeed, We are [its] expander." [Quran 51: 47]
The original unity of the universe comes from its explosion to a huge cloud of smoke from which the different heavenly bodies were formed by separation into eddies of various masses followed by condensation. The condensed bodies were arranged into stellar systems, clusters, galaxies, supergalaxies,etc., and the formed galaxies started to drift away from each other, causing the steady expansion of the universe.
The Holy Quran describes these three successive stages in the verses (41: 11) and (21: 104).
"Then He (Allah) turned to the sky while it was smoke, and ordered it the earth to come into being willingly or unwillingly, they answered: we do come in willing obedience*" (41: 11)
"The Day when We shall roll up the heavens and a recorder rolleth up a written scroll. As We began the first creation,We shall repeat it. ( It is ) a promise ( binding ) upon Us . Lo! We are to perform it." (21:104)
Also Qur'an mentions about the layers as well :
"It is Allah who created the seven heavens and of the earth the same number.'' (Surat at-Talaq: 12)
Throughout the Qur’an, Allah mentions the seven heavens or skies. It's that scientifics called,troposphere, stratosphere,mesosphere,thermosphere,ionosphere,exosphere and magnotosphere.
