Black Country news and blogs Wednesday 19 September 2018
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Blog feature
A Nearly Spotless Sun Towards Solar Minimum – 12th May

13 May 18

As we head towards solar minimum activity on our Sun will get less and less.

Imaging in CaK light is a good way to show up activity that can be difficult to see in white light views. Three active regions are currently on the suns earthward face, with the largest of these closer to the eastern limb showing a couple of small pores where magnetic field loops break the solar surface. This image was taken at 393nm in Calcium light with the homebrew CaK…

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