An animated comparison prepared from my images by Tom Polakis contrasting the surface of the sun (photosphere) seen in full spectrum

visible light with the solar atmosphere (chromosphere) seen through a narrowband filter centered at the Ca-K line of the spectrum (near UV).

July 17, 2016/ Zeiss APQ 130 telescope, Baader Herschel wedge white light filter and PGR Grasshopper Express 6 megapixel camer/ Coronado 70mm CaK telescope courtesy Dennis Zywiczynski.

© Alan Friedman | all rights reserved