I was just wondering that during the suns mains sequence would it maintain a constant temperature at the surface and only cool once the hydrogen in its core runs out, or is it always slowly decreasing?

  • $\begingroup$ I'm guessing you want to average stuff like sun spots and solar cycles and such? $\endgroup$ – Nat Apr 19 at 10:07
  • $\begingroup$ Yes, I know that there will be variations across the sun, but as an average is it cooling down, or does it maintain a roughly constant power output during its main sequence? $\endgroup$ – Vishal Jain Apr 19 at 10:18
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    $\begingroup$ In other words, is the solar constant constant? It is not, but almost $\endgroup$ – Hagen von Eitzen Apr 19 at 10:29
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    $\begingroup$ This plot looks helpful. $\endgroup$ – Nat Apr 19 at 11:09

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