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Questions tagged [sunspots]

Questions regarding the darker areas on the solar disk formed by emerging magnetic fields.

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Sun (star) spots (size)

My question is about sunspots size. Does these spots have a 'typical' size for all kinds of stars (dwarves or super giants), or are they dependent on a star size? In another words, is the statement ...
Uri Shlomy's user avatar
3 votes
0 answers
165 views

How a sunspot number is calculated by an individual observer?

How a sunspot number is calculated by an individual observer? I would like to learn how to calculate the daily number of sunspots and where to get daily input images of the Sun. I have read tens of ...
darius's user avatar
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3 votes
0 answers
142 views

Density of a sunspot compared to the surrounding photosphere?

Is the density of a sunspot different by more than a factor of ten compared to the area surrounding the sunspot?
Bob516's user avatar
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2 votes
0 answers
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How to build functional sunspot model on the ground with high-power plasma burners in the strong magnetic field as conference paper?

I need to build functional sunspot model on the ground with high-power plasma burners in the strong magnetic field as conference paper. What I get is light-weight plasma, as exactly plasma is. But I ...
darius's user avatar
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2 votes
0 answers
135 views

Help finding a database or analysis of plage regions on the Sun

Plages are phenomena of stellar activity. A plage is a bright region in the chromosphere of the Sun, typically found in and around active regions. The term itself is poetically taken from the French ...
Autodidact's user avatar
1 vote
0 answers
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How does the entropy diffusivity changes with radius in the Sun?

Could you please explain - How does the entropy diffusivity changes with radius in the Sun? As far I know, In the convection zone, the entropy diffusivity increases as the temperature and density ...
stayhappy's user avatar
1 vote
1 answer
165 views

What is a place to find raw numbers of sunspots from the past, as counted daily by sun observer?

What is a place to find raw numbers of sunspots from the past, as counted by sun observers ? I have already visited 100+ of websites (NOAA, NASA, ESA, Japanese Institute ..) and what is offered is ...
darius's user avatar
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1 vote
0 answers
249 views

Are sunspots named or individually tracked?

This is a follow-up question to How are the solar flares from May 23, 2021 extraordinary? which is about news of spaceweather.org. In the present question, I am curious solely about sun-spots and why ...
B--rian's user avatar
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