At one stage during its birth, the protosun had a luminosity of 1000 L_sun and a surface temperature of about 1000 K. At this time, what was its radius? Express your answer in three ways: as a multiple of the Sun's current radius, in kilometers, and in AU.

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21 October, 13:03

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Abigayle Richard · Answer 1

Using T = 5800k, we have that,

R/R. = (T/T.) ^2=L/L. = (5800/1000) ^2 = 1.1 * 10^3. Of the suns radius.