The challenge was a daunting one, and Arago took some time to make a decision. However he finally decided that he would accept the prestigious offer, was nominated formally on 22 February 1805 and then moved into the Paris Observatory which would become his headquarters.
Ang hamon ay ang isang daunting isa, at Arago kinuha ng ilang panahon upang makagawa ng isang pasiya. Gayunman siya ay nagpasya na sa wakas siya ay prestihiyoso tanggapin ang alok, ay nominated pormal sa 22 Peb 1805 at pagkatapos ay inilipat sa Paris obserbatoryo na kung saan ay maging punong-himpilan ng kanyang.