# Bunsen Burners and the Sun

1. Why do Bunsen burners burn blue in the center? What element is being burned?
2. Why does the sun glow yellow, and not blue-a Bunsen burner is much cooler and yet it burns blue. Is it because the relative size, or are they two different phenomena? (i.e. black body radiation and something else?)
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The Wikipedia article on butane has a spectrum showing the $\mathrm{CH}$ radical as the primary source of blue emission: