APOD 3.5

I posted APOD 3.2 and 3.4, since I had mistakenly saved them as drafts. Anyways, this awesome picture is of the FLAME nebula, in the constellation Orion. It's unique orange glow is due to the high concentration of hydrogen atoms glowing. The void in the middle of the nebula is a dust cloud that blocks the source of the clouds : a young star cluster. An infrared picture reveals the stars in all their glory. The largest of these is probably the source of the ultraviolet radiation that ionizes the hydrogen, thus creating the magnificent view we see here.