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Solar spots seams to be a good indicator of solar activity. Does anyone know the reason for the Maunder and Dalton minima?

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    $\begingroup$ Props to anyone who can answer this. My understanding is that the cause isn't known, but it's observed that the sun spends about 15% of the time in a grand minimum and observations of other stars agrees with that estimate. I don't know of and I've never seen a good explanation for precisely why the sunspot cycle enters periods of grand minimum. Source on the 15%: forbes.com/sites/brucedorminey/2014/01/20/… $\endgroup$ – userLTK Aug 12 '17 at 7:16
  • $\begingroup$ I would be very interested in knowing whether other stars with spots have also planets around. $\endgroup$ – luis blas Cabrera Aug 12 '17 at 13:39
  • $\begingroup$ @luisblasCabrera We have definitely found stars with planets that also have sun spots. This is pretty much true of almost every M Dwarf that has planets. M Dwarfs can have huge sunspots and as such, it can actually be a challenge to separate out detections of planets from sunspots. $\endgroup$ – zephyr Aug 14 '17 at 13:07
  • $\begingroup$ Tank you @zephyr and. Calculations show me that sun spots and storms seemed to be strongly related to the solar system evolution. $\endgroup$ – luis blas Cabrera Aug 15 '17 at 16:52

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