File:A very high resolution view in calcium light reveals pulsations in the umbral core and great detail of the penumbral filaments.gif
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A_very_high_resolution_view_in_calcium_light_reveals_pulsations_in_the_umbral_core_and_great_detail_of_the_penumbral_filaments.gif (751 × 595 pixels, file size: 23.57 MB, MIME type: image/gif, looped, 66 frames, 2.0 s)