“By the sky which returns.” (Quran 86:11)
“[He] who made for you the earth a bed [spread out] and the sky a ceiling…” (Quran 2:22)
In the first verse God swears by the sky, and its function of ‘returning’ without specifying what it ‘returns.’ In Islamic doctrine, a divine oath signifies the magnitude of importance of a special relation to the Creator, and manifests His majesty and the supreme Truth in a special way.
The second verse describes the Divine Act that made the sky a ‘ceiling’ for the dwellers of earth.
Let us see what modern atmospheric science has to say about the role and function of the sky.
The atmosphere is a word which denotes all the air surrounding the earth, from the ground all the way up to the edge from which space starts. The atmosphere is composed of several layers, each defined because of the various phenomena which occur within the layer.
Not only does the atmosphere return what was on the surface back to the surface, but it reflects back into space that which might damage the flora and fauna the earth sustains, such as excessive radiant heat. In the 1990’s, collaborations between NASA, the European Space Agency (ESA), and the Institute of Space and Astronautical Science (ISAS) of Japan resulted in the International Solar-Terrestrial Physics (ISTP) Science Initiative. Polar, Wind and Geo-tail are a part of this initiative, combining resources and scientific communities to obtain coordinated, simultaneous investigations of the Sun-Earth space environment over an extended period of time. They have an excellent explanation of how the atmosphere returns solar heat to space.
Besides ‘returning’ rain, heat and radio waves, the atmosphere protects us like a ceiling above our heads by filtering out deadly cosmic rays, powerful ultraviolet (UV) radiation from the Sun, and even meteorites on collision course with Earth.
Pennsylvania State Public Broadcasting tells us:
“The sunlight that we can see represents one group of wavelengths, visible light. Other wavelengths emitted by the sun include x-rays and ultraviolet radiation. X-rays and some ultraviolet light waves are absorbed high in Earth’s atmosphere. They heat the thin layer of gas there to very high temperatures. Ultraviolet light waves are the rays that can cause sunburn. Most ultraviolet light waves are absorbed by a thicker layer of gas closer to Earth called the ozone layer. By soaking up the deadly ultraviolet and x-rays, the atmosphere acts as a protective shield around the planet. Like a giant thermal blanket, the atmosphere also keeps temperatures from getting too hot or too cold. In addition, the atmosphere also protects us from constant bombardment by meteoroids, bits of rock and dust that travel at high speeds throughout the solar system. The falling stars we see at night are not stars at all; they are actually meteoroids burning up in our atmosphere due to the extreme heating they undergo.
Encyclopedia Britannica, describing the role of Stratosphere, tells us about its protective role in absorbing dangerous ultraviolet radiation:
“In the upper stratospheric regions, absorption of ultraviolet light from the Sun breaks down oxygen molecules; recombination of oxygen atoms with O2 molecules into ozone (O3) creates the ozone layer, which shields the lower ecosphere from harmful short-wavelength radiation…More disturbing, however, is the discovery of a growing depletion of ozone over temperate latitudes, where a large percentage of the world’s population resides, since the ozone layer serves as a shield against ultraviolet radiation, which has been found to cause skin cancer.”
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The mesosphere is the layer in which many meteors burn up while entering the Earth’s atmosphere. Imagine a baseball zipping along at 30,000 miles per hour. That’s how big and fast many meteors are. When they plow through the atmosphere, meteors are heated to more than 3000 degrees Fahrenheit, and they glow. A meteor compresses air in front of it. The air heats up, in turn heating the meteor.
Earth is surrounded by a magnetic force field – a bubble in space called “the magnetosphere” tens of thousands of miles wide. The magnetosphere acts as a shield that protects us from solar storms. However, according to new observations from NASA’s IMAGE spacecraft and the joint NASA/European Space Agency Cluster satellites, immense cracks sometimes develop in Earth’s magnetosphere and remain open for hours. This allows the solar wind to gush through and power stormy space weather. Fortunately, these cracks do not expose Earth’s surface to the solar wind. Our atmosphere protects us, even when our magnetic field does not.
How would it be possible for a seventh century desert dweller to describe the sky in a manner so precise that only recent scientific discoveries have confirmed it? The only way is if he received revelation from the Creator of the sky.
