Black Country news and blogs Sunday 22 July 2018
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Blog feature
Active Regions in Calcium Light – 12th May

13 May 18

A trio of active regions are currentlytransitingthe earthward face of the sun.

Visible as bright plage in CaK wavelengths where there is higher magnetic field strength. Taken at 80mm aperture fl 1000mm with the homebrew CaK filter and the PGR Chameleon 3 camera.

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