The BS and ignorance from Sisu is off the scale
Coronal holes are not black. They appear dark in those images because they are filtered images looking at plasma at a specific temperature. In filtered images dark areas imply less plasma at that specific temperature, which is either a result of a lower plasma density or the plasma being hotter or colder than the temperature corresponding to the filter being used.
The effect of limb darkening in visible light images of the Sun cannot be compared to darkening in filtered EUV images of coronal holes

and in no way implies the Sun is not thermonuclear
[HASHTAG]#fail[/HASHTAG]
Astro false argument, my point was related to
emissivity v conductivity, nothing to do with colour, I can quote my post above is you wish. Do you understand the difference between those two?
I referred to them as "dark" and referred to the dark images as "black"
The "dark" as I call it means "lack of emissions", you can't even understand what you are trying to argue against
No one inferred a colour to coronal holes, you just make another false argument.
The imagining fallacy you are trying desperately to perpetrate is a good example.
These "holes" or "cool spots" are convection related so the theory goes, but it has not been reconciled with the distinct lack of convenction, they are not cool spots tho, they are every bit as hot as the surrounding area, the "low plasma pressure and temperture btw not just temperature", in fact they are hotter possibly due to the pressure and turbulence in those areas as well as the exiting magnetic pathways transferring more energy along those pathways, as with the latest images it looks like these coronal holes above the surface and touch down as it were, the walls of these holes can be seen with what look like tornadoes touching down, travelling from the Corona to the surface of the sun.
But more to the point, when coronal holes appear, there is a lack of emission in most spectrums of visibility, which makes a mockery of the solar thermonuclear fusion model because the emissions should not all be affected by the surface pressures temperatures at all in terms of viewing many different spectrums.
Electromagnetic force go much further to explain coronal holes
A graphical representation of what happens when a coronal hole appears and the magnetic force that carried energy away from the sun. The magnetic field which is highly conductive, like strings and the waves of energy that travel along it.
Coronal holes are holes in case you didnt know are holes in the atmosphere, they are not related to what happens inside the sun, the whole cool spots argument is
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Two of the most important unsolved problems in heliospheric physics are the origin of the solar wind and the heating of the solar corona
Because obviously the corona is hotter than the deeper layers.