288. Sky being a protected canopy.

Verses (2:22, 21:32, 40:64, 52:5) of the Quran denote the sky as a protected canopy. 

When you call a structure a canopy or a roof, it means a protection that wards off dangers like heat, rains , snow etc; from above. 

Some may pose a question, how a structure that we do not even realize exists can be a roof?

Based on modern research carried out in recent times, we realize the sky remaining a canopy for the earth as declared by the Quran.

The word sky is used in the Quran in two contexts. (Please refer to explanations point no; 507 to know more in this regard.)

The daytime temperature of the Moon is 127℃. The earth being closer to the moon should more or less be maintaining the same heat, but has an average temperature of 40℃, it is because of the existence of the sky as its canopy/roof with air.

The first layer of atmospheric air is at a distance of 16 kms, from the surface of the earth. This acts as a barrier to ward off ⅔ of the heat intensity directly from the Sun.

This layer also consists of Oxygen, Nitrogen, and Carbon Di-Oxide. 

Air is prevalent in the atmosphere between a distance ranging from 16 kms to 50kms facilitating air transport. 

The Ozone layer exists in the atmosphere in this second layer at a distance ranging from 20 kms to 50 kms from the surface of the earth. The rays of the sun have a combination of seven colors with different wavelengths, the ultra-violet rays being the most dangerous to humans, destroying cells in their bodily structure.

The technology using ultraviolet rays to destroy organisms is used for treatment of water. These ultra-violet rays are powerful in destroying the bacteria completely.

The Ozone layer prevents ultraviolet rays from reaching and destroying organism living on earth.

Thus we find the sky acting as a protective covering.

The middle layer of the atmosphere lies at a distance between 50 kms and 80 kms. And we witness every now and then meteorites and comets coming towards the earth at speeds ranging from 43,000 and 57,000 kms/hr.

This middle layer of the atmosphere stops and burns away some meteorites with an expanse as huge as 96,000 sq meters rushing towards the earth, preventing horrible catastrophes. 

And also the speed of the resultant debris is controlled by it. 

Here again we see the sky acting as a protective roof.

There is a heat layer in the atmosphere at a distance of about 80 kms and 1600 kms above the surface of the earth containing gases like Helium, Hydrogen etc; that keeps preventing the passage of light and sound waves sent from earth, through them.

We find the sky as a protective covering preventing light and sound waves escaping from the earth.

The Almighty after having created all such protections against dangers to the earth calls the sky in the Quran a protective roof. 

These verses also prove the Quran as the word of God.aa