What surface temperature is stated for the red supergiant Betelgeuse, which results in its orange appearance?
Answer
About 3,700 K
Betelgeuse, specifically referenced as a red supergiant, possesses a surface temperature relatively low compared to hotter stars. The text states that this star has a relatively cool surface temperature of about 3,700 Kelvin. This lower temperature causes the star's peak light emission to fall within the longer, redder wavelengths of the visible spectrum, leading to its familiar deep orange or reddish hue when viewed.
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