Total Solar Eclipse from Zambia, 21 June 2001
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composite of four images
See the green circle in the center caused by FeXIV emission, the H-beta emission (turquoise, left),
and Helium (yellow, right).
Polarisation of the corona
The pictures have been taken through a polarising filter with relative
positions of a polarising filter of 0°,60°,and 120°
The individual 0°,60°,120°-images have been RGB (red,green,blue) color-coded and
superimposed to demonstrate the differently polarised areas of the corona: