Goodman Games

definitely
L. Sprague de Camp's Viagens Interplanetarias
Leigh Brackett's Solar System
Jack Vance's Planet of Adventure
pre-Star Wars aesthetic
Planetary romance-y but with travel between solar systems

possibly
Andre Norton's Witch World
40s Sci-Fi serials
50s Sci-Fi films
Bubble Helmets
Zapguns
BEMs