We all know what a sunset is right? But not all of us know what makes the sky red right? Well now your about to find out. The atmosphere scatters light, not all light though. The atmosphere is better at scattering blue light away which means that blue light gets dispersed all throughout the sky pretty easily. But red light is more likely to pass right through,which is why things appear redder on the horizon: More of the bluer light gets scattered away, while the red light comes (mostly) through to you.
This is also a great post Teague. Well done on researching information about sunsets. Great post.