This is an image of an eclipse from 1919, that was used in part to prove Einstein's theory of general relativity.
https://en.wikipedia.org/wiki/Eddington_experimentYou can download the full size image (24085 x 19423 px) from here
https://www.eso.org/public/images/Sonnenfinsternis-CC/ if you want to crop a version yourself. There's some smaller ones there as well if you don't want to download the big fucker.
