Allah SWT says: الَّذِى خَلَقَ سَبْعَ سَمٰوٰتٍ طِبَاقًا ۖ مَّا تَرٰى فِى خَلْقِ الرَّحْمٰنِ مِنْ تَفٰوُتٍ ۖ فَارْجِعِ الْبَصَرَ هَلْ تَرٰى مِنْ فُطُورٍ "[And] who created seven heavens in layers. You do not see in the creation of the Most Merciful any inconsistency. So return [your] vision [to the sky]; do you see any breaks?" (QS. Al-Mulk: Verse 3) * Via the Beautiful Qur'an https://goo.gl/QLwc8B