Here we have different gasses and what color they glow when excited by an electrical charge. Notice hydrogen is pink.
So what conclusion did we come to? That there is overwhelming evidence that:
1) If we had a Crystalline Hydrogen Canopy, it would have been pink like Dr. Carl Baugh said.
2) Crystalline or Metallic Hydrogen is a reality, so the Crystalline Hydrogen Canopy is a possibility.
3) That science is only beginning to figure some of these things out.
4) We can just look around us and into space and see that this very well could have been a possibility.
5) Most metals, in their purest forms, can be transparent "like glass" as God's word explains it. etc...
Why is the sky blue?
Our atmosphere is made up of a mixture of gasses. 78% nitrogen, 21% oxygen and a much smaller percent of other gasses that can vary according to your location and weather conditions. Notice that nitrogen is the dominate gas in our atmosphere. Now look at what color nitrogen molecules are when they become excited. Blue, just like our sky. The color blue has the shortest wave link in the color spectrum. Which makes it the hardest color for our eyes to focus on. This is why when astronauts from the space shuttle(orbiting earth) look at earth they can see through our atmosphere with only a slight blue tint. But when you move further into space our whole planet turns blue. But you still can see through the atmosphere.
Why is the blue sky not transparent like it is from outer space? The energy that comes from the sun that excites the nitrogen gas as it passes through our atmosphere is traveling in one direction. But some of that energy is reflected from the earth back at our atmosphere making the nitrogen molecules closest to earth excited and become blue. From space this cannot be seen. Because the energy reflected back into our atmosphere gives our atmosphere a one way mirror effect. You can see in but you can't see out. Until night comes of course. This is why our atmosphere does not look as blue from outer space as it does to us when we look at it.
The theory on the blue sky that's been around for a while is here at this link: http://www.sciencemadesimple.com/sky_blue.html This is called the scattered light theory.
Here we have Dr. Carl Baugh holding a vacuum tube which was filled, with the same mixture percentages, of both Hydrogen and Oxygen, that would have been considered before the flood. An electric sine wave was introduced to the tube, a sine wave similar to the sun's. Upon doing this, the Hydrogen and Oxygen separated. The pink Hydrogen stayed in the smaller compressed part of the tube, while the blue oxygen stayed towards the outside not compressed part of tube.
Spectra of Hydrogen Gas Discharge: 
Spectra of Oxygen Gas Discharge:
And, as you can see here (from the picture), different gas molecules can glow different colors according to how high they are up in our atmosphere when the electrons hit them and excite them to glow a color. Now notice what color nitrogen is. It's blue between 100 and 200 km. Now since it only does this at this distance in our atmosphere. Does not this seem more plausible as to why we can actually tell there is a distance from where we are, and where the blue sky is? Because nitrogen molecules only turn blue at that altitude.
This also supports why the blue part of the sky, from space, looks like only the upper atmosphere is blue. This is because nitrogen only turns blue at that altitude.
This would also mean that the nitrogen that reacts at this level is in the thermosphere as shown in the picture above. Because of the temperatures in this part of our atmosphere, reactions of different things happen much faster here. This in itself could explain why this happens at this altitude only. The temperature there plus the electrons play a role. I'm not sure, but I think gas can be more reactive to different things when it is heated like this. Which would explain why it's having a reaction to the electrons from the sun.
