This image is a derivative work of the following images: File:Fraunhofer_lines_DE.svg licensed with PD-ineligible 2009-06-11T10:19:23Z Cepheiden 768x225
org/licenses/by/4.0CC BY 4.0 Creative Commons Attribution 4.0 truetrue English Fraunhoferlines in the spectrum of the Sun just before the total solar eclipse on April