Surah Nuh (Noah ) 71 : 15

Explanatory Note 

We cannot specify a meaning for the 'seven heavens' on the basis of scientific theories about the universe, for these are only theories. Noah simply draws their attention to the skies. He tells them, as God taught him, that there are seven heavens in layers, and that they include the sun and the moon, which they could obviously see, just as they saw what they called the sky, which is that familiar blue coloured space. To know what it is exactly is not necessary. Nor has it been properly proven even today. The invitation to look though is enough to reflect on the supreme power that has brought such great creatures into existence. This is what Noah wanted his people to do.