On the first day, God said, “Let there be light,” and there was a brilliantly vast spectrum of electromagnetic radiation with boundless and complex possibilities … that contrasted vividly with the absence of light. Heat, communication, visibility, color, technology, and medical imaging/surgery are all possible because of light. That’s quite a lot to accomplish on the first day.

On the second day, God said, “Let there be an expanse between the waters to separate water from water. So God made the expanse and separated the water under the expanse from the water above it. And it was so. God called the expanse ‘sky’ … ” (Genesis 1:6-8 NIV)

That’s it for the second day? Just sky? I had to take a closer look.

First off, God made a space between areas of water. What was in that space? Air. The mixture of oxygen and nitrogen and carbon dioxide and other gases necessary for life to exist since I don’t breathe water. This layer of air, our atmosphere, also protects us by absorbing excess ultraviolet radiation from the sun. It retains heat close to the Earth’s surface through the greenhouse effect and therefore reduces the extreme temperature swings between day and night.

What keeps all these gases from floating away into the far reaches of the universe? Gravity. And the Earth’s magnetic field. Molten iron below the Earth’s surface – kept in motion through the Earth’s rotation – creates a magnetic field similar to a bar magnet inserted along the Earth’s axis. (The magnetic “north pole” shifts a little every year but is reliable enough to make a compass helpful.) This magnetic force field blocks and deflects most of the solar wind which would blow away our atmosphere!

It seems to me that in creating the sky, God also created gravity, molten layers below the surface, a precise rotational speed to generate a magnetic field … and then created oxygen, nitrogen, and carbon dioxide in the exact ratios necessary for life.

“For since the creation of the world God’s invisible attributes – his eternal power and divine nature – have been clearly seen, being understood from what has been made, so that men are without excuse.” (Romans 1:20 NIV)

Every breath I take is evidence of God’s provision and protection.

What about you? Do you appreciate the air around you or take it for granted? Is God’s hand of protection easily seen or hidden from view?

Creation Declares – Sky