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Nicely done! Any idea what the field of view is?

Thanks! The horizontal FOV is around 5 arcminutes. The granules (the bright convection cells comprising most of the image around the sunspots) are about 1000 km across on average.

That’s wild!

What are the features apart from the granules? The black feathers rimming the totally dark areas? What are these up close?

Wikipedia has it has a pretty great article on sunspots.

https://en.m.wikipedia.org/wiki/Sunspot

Your question got me curious, those are called penumbral filaments. Their form has to do with the orientation of the magnetic field relative to the surface of the sun.

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