The world’s first exhibition of interplanetary spacecraft and mechanisms in Moscow, USSR, 1927. The exhibition featured models…

The world’s first exhibition of interplanetary spacecraft and mechanisms in Moscow, USSR, 1927. The exhibition featured models of rocket vehicles and “interplanetary language of logical concepts” with an alphabet of eleven letters depicted by algebraic signs. pic.twitter.com/BsczEzOhB0

— Soviet Visuals (@sovietvisuals) October 29, 2018

(via http://twitter.com/sovietvisuals/status/1056810132011651072)