A comparison of Sunday's sun in two wavelengths... full spectrum visible light on the left, the calcium K line (near ultraviolet) on the right. Both images captured with monochrome cameras - colorized to show the contrast in structures. Large active regions 2565 and 2567 are seen at the center of the disk.
July 17, 2016/ Zeiss APQ 130 telescope, Baader Herschel wedge white light filter and Coronado 70mm CaK telescope. captured with PGR Grasshopper cameras.
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