Robert Goddard was the Clark University physicist responsible for “A Method of Reaching Extreme Altitudes.”
Published by the Smithsonian Institution in 1919, the report explained how rockets could reach extreme heights by expelling gases at high velocity. Goddard argued that rockets could work even in a vacuum, a point that was widely misunderstood at the time. His work drew on the physics of momentum and helped establish the theoretical foundation of modern rocketry.
Goddard earned his doctorate from Clark University in 1911 and later became a professor there. In 1926, he launched the world’s first successful liquid-fueled rocket near Auburn, Massachusetts. The flight lasted only about 2.5 seconds, but it demonstrated a technology that later became central to space exploration.
A common mix-up is confusing this report with the writings of Konstantin Tsiolkovsky or Hermann Oberth, who also made important contributions to rocket theory. Goddard’s distinctive achievement was combining theoretical work with practical rocket experiments.