What you see here is the entire gamut of our Sun's visible light output. It clearly shows you how the Sun emits almost every color, but how the output of some colors, such as yellow and green, are brighter than others. Perhaps more interestingly, though, the black lines illustrate the portions of the visible light spectrum that are not emitted by the Sun -- and to this day, we still don't know why some portions of the visible solar spectrum are absent.