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

CC BY-SA 3.0
2017-08-12T07:16:53.480Z
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%:  https://www.forbes.com/sites/brucedorminey/2014/01/20/sun-flatlining-into-grand-minimum-says-solar-physicist/#7aad368718de
userLTK
CC BY-SA 3.0
2017-08-12T13:39:46.847Z
I would be very interested in knowing whether  other stars with spots have also planets around.
luis blas Cabrera
CC BY-SA 3.0
2017-08-14T13:07:55.150Z
@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.
zephyr
CC BY-SA 3.0
2017-08-15T16:52:55.300Z
Tank you @zephyr and. Calculations show me that sun spots and storms seemed to be strongly related  to the solar system evolution.
luis blas Cabrera
<fundamental-astronomy>
Does anyone knows the origin of the Maunder Minimum and Dalton minimum?
luis blas Cabrera
# Does anyone knows the origin of the Maunder Minimum and Dalton minimum?

(Asked by: username_0 on 2017-08-11)

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

**Tags:** fundamental-astronomy

> **Comments:**
> **username_1**: 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%:  https://www.forbes.com/sites/brucedorminey/2014/01/20/sun-flatlining-into-grand-minimum-says-solar-physicist/#7aad368718de  
> **username_0**: I would be very interested in knowing whether  other stars with spots have also planets around.  
> **username_2**: @username_0 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.  
> **username_0**: Tank you @username_2 and. Calculations show me that sun spots and storms seemed to be strongly related  to the solar system evolution.  

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