War or peace? The possible scenarios of colonising Mars
von Braun and the lunar-orbit rendezvous decision: finding a way to go to the moon
Transforming solar system exploration: The origins of the Discovery Program, 1989–1993
The Swedish Interplanetary Society (1950–1969) and the formation of IAF and IAA
The propulsion system for the “Ludion” one-man hopper
The pioneers of interplanetary communication: From Gauss to Tesla
The International Geophysical Year: Its influence on the beginning of the French space program
The idea of Space Weather – A historical perspective