It is difficult to say what is impossible, for the dream of yesterday is the hope of today and the reality of tomorrow.

Robert H. Goddard· 미국 · 1882 – 1945

Robert H. Goddard was an American physicist and inventor who built and launched the world's first liquid-fueled rocket, earning him the title of father of modern rocketry. His pioneering work laid the technical foundation for the later age of space exploration.