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Is the density of a sunspot different by more than a factor of ten compared to the area surrounding the sunspot?

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  • $\begingroup$ No. It just is cooler. $\endgroup$ – planetmaker Jul 21 '20 at 22:41
  • $\begingroup$ Hmm... both the question What is the density profile within the Sun's photosphere? Which one of these is wrong? and its answer(s) give a density for the Sun's photosphere of about $3 \times 10^{-7} \text{g/cm}^3$, Your link says "10^{-9} g/cm^3" which is really $1 \times 10^{-9} \text{g/cm}^3$ which is written "1E-9" in "computerese" rather than "10E-09" so I think you've transcribed that incorrectly and it's incorrect to begin with as well! $\endgroup$ – uhoh Jul 21 '20 at 23:03
  • $\begingroup$ @planetmaker Is a localized plasma that is cooler than the surrounding plasma the same density? $\endgroup$ – Bob516 Jul 21 '20 at 23:16
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    $\begingroup$ of course the pressure balance applies. Yet in sun spots the magnetic pressure accompanies the gas pressure so that density will not be much different $\endgroup$ – planetmaker Jul 21 '20 at 23:19

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