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Message Subject The SUN is FROTHING - Is this normal?
Poster Handle Anonymous Coward
Post Content
Nothing unusual - happens all the time: [link to www.google.de]

Photos from 2008: [link to www.strehlbuster.com]

The filter shows the sun in a wave lenght, that is almost UV - thus it is used mainly for photographic purpose (not visual observation).

The CaK filter shows the layer between the photosphere (white light) and chromosphere (H-alpha).
It's not so common, because it is quite expensive (US$ 350 compared to a white light filter US$ 20) and doesn't show solar flares as nice as an H-alpha filter.


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 Quoting: Hydra


oh, okay. maybe it's nothing then... unless it keeps growing.
 
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