Arago had learnt of Foucault's expertise with photography through a microscope on the publication of his book with Donné. He approached Foucault and Fizeau, who he knew personally, in 1845 and asked if they could try to take photographs of the sun.
Arago had learnt ng Foucault's kadalubhasaan sa photography sa pamamagitan ng isang mikroskopyo sa publikasyon ng kanyang mga libro na may donne. He approached Foucault at Fizeau, na siya, alam ng personal, sa 1,845 at nagtanong kung sila ay subukan na gumawa ng mga litrato ng Linggo.