One thing I never understood is how a star hotter than the hottest sun can appear in a dark night sky.
The Peary, which Hergé must have found just as quaint as we do, really existed: It was used by Denmark in the 1951 Pearyland expedition (to the North coast of Greenland) Hergé took the plane off and gave it to Tintin. The plane Peary carried was a NoorduynNorseman. Over 900 of them were built in Canada by the former Dutch Fokker manager, between 1935 and 1959
The original of Tintin's plane is a ~1939 German Arado AR196 floatplane The Bismarck carried five of them