

Image credit: Grumman
Image source: Cradle of Aviation Museum

Image credit: NASA KSC
Image source: Drew Granston

Image credit: North American Aviation
Image source: National Archives

Electrostatic ion-powered five-man spacecraft passing over Mars’ moon Phobos on the way to Mars. One of two “scout cars” will land on the tiny moon and rendezvous with the ship later.
Mars: Planet for Conquest
by Erik Bergaust
G.P Putnam’s Sons, 1967
Rocketdyne
Image source: Numbers Station