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What is the Temperature of the Sun at a Wavelength of 21cm?

-- John | December 3, 2019

Artist Impression of star about to undergo supernova

Question:

What is the temperature of the Sun at 21 centimeter wavelength?

-- John

Answer:

At sunspot minimum, the apparent disk temperature of the Sun is about 70,000 Kelvin. At sunspot maximum the apparent disk temperature of the Sun is about twice this value, or about 140,000 Kelvin.

-- Jeff Mangum

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