Hello Guys,
I have an exciting new theory to present you all. I've been pondering the image of the Night Sky above us and have been trying to Map out what the stars, planets, and even Galaxies look like above us. So far, my best guess is that the sky is a representation of the traditional solar system as seen above us, but much smaller in scale. Attached is a preliminary picture:

Source:
https://space-facts.com/asteroid-belt/The stars and constellations are actually members of the Asteroid belt! In order to make this work a few things need to happen:
1) The earth needs to spin once every 24 hours in order to get a full view of all the constellations during the day and night.
2) The earth needs to wobble once a year in order to account for a Second circular motion all the constellations make once a year. Thats why you see some constellations in winter and others in summer.
Lastly, I've looked into what the Dome might be made of and came across this interesting article...
http://www.utahpeoplespost.com/2016/01/physicists-solid-metallic-hydrogen/"Theorists have long predicted that extreme pressures combined with mild temperatures should cause hydrogen to turn the normally clear gas into a glossy, grayish, metallic solid."
This is the kind of material that would allow light to reflect around the atmosphere. Hydrogen is abundant in space and I assume once it hits the earths atmosphere the necessary pressure is produced.