Measuring Surface and Calculating Core Temperature of Stars
How did astronomers measure the temperature of
the sun to get approximately 14 million degree Celsius in the core, and 6000
degree Celsius on the surface?
Generally, if we know the mass of the Sun and its radius, we can then use
physics to calculate what these temperatures should be. Bolometric methods
also can work.
David H. Levy
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Update: June 2012