Here’s a curiosity for collectors: Andrew Porter has scanned images of nine postcards and two souvenir buttons he bought at the Hayden Planetarium that document the popularization of space exploration long before the first Moon landing. For example, the caption on one of them reads:

THE VIKING ROCKET. This authentic 45 foot precision instrument is an actual rocket composed in part of sections recovered from the wreckage of Vikings built by the Martin Company of Baltimore and used by the Navy to probe the upper atmosphere. A rocket like this reached an altitude of 158 miles in May 1954.

And of course, the diagram of the Solar system shows 9 planets. Ah, the good old days.