Jean-Jacques Waltz (23 February 1873, Colmar – 10 June 1951), also known as "Oncle Hansi", or simply "Hansi" ("little John") was a French artist of Alsatian origin. He was a staunch pro-French activist, and is famous for his quaint drawings, some of which contain harsh critiques of the Germans of the time. He was also a French hero of both the First and the Second World Wars.
Nicolas Camille Flammarion FRAS (French: [nikɔla kamij flamaʁjɔ̃]; 26 February 1842 – 3 June 1925) was a French astronomer and author. He was a prolific author of more than fifty titles, including popular science works about astronomy, several notable early science fiction novels, and works on psychical research and related topics. He also published the magazine L'Astronomie, starting in 1882. He maintained a private observatory at Juvisy-sur-Orge, France.