Transcript: The visible surface and edge of the Sun and the region where sunspots lie is the Sun’s photosphere. Just above the photosphere lies the chromosphere or color layer. This is a slender region of pink gas at a temperature of about ten thousand degrees Kelvin. The pink color comes from emission from hydrogen alpha, the single spectral transition of an excited hydrogen that comes out in the red part of the visible spectrum. The solar chromosphere is best seen during a total eclipse when the moon blocks out the Sun’s light, and the delicate radiation of the chromosphere and its color can clearly be seen. Beyond the chromosphere the Sun fades out into deep space.