“If, in the course of centuries, we colonize all of the available planets in our solar system, this will be done mainly by the force of necessity.”

About Willy Ley

Author • American

Willy Ley was a German-American science writer and a pioneering advocate for rocketry and spaceflight. Born in Berlin, he co-founded the German 'Verein für Raumschiffahrt' (Society for Space Travel) before emigrating to...