This is our galaxy taken in infrared. Normally, we are unable to see this much into our own galaxy due to the presence of so much galactic dust floating all around. But as you can see, the blue straight line that we see in the middle is actually our sky, which is seen around the 3.5 μm which more or less transparent, which thus allows us to be able to see the light from the stars without obstruction. The green and red lights in this picture are around the 12 and 22μm respectfully. Here is also an awesome site that lets you view the galaxy in several other spectrums, and not to mention it proved the coordinates to the spots you look at.
http://www.chromoscope.net/
2 points. Is the blue emission really our sky? That emission is at 3.5 microns wavelength. Also, this is an "all sky" view showing the entire celestial sphere. Why would the sky only emit in this small flat region?
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