From the Earth to the Moon

The Baltimore Gun Club is introduced as a fraternity of Civil War ordnance specialists suddenly deprived of their purpose once the fighting stops, men who spend peacetime bored, restless, and visibly diminished by the absence of a target, and Verne's satire lands squarely on that premise before the plot even reaches the moon: a nation this fluent in building bigger and bigger weapons will, once the actual war runs out, simply invent a new one to aim at, since the appetite for scale was never really about the enemy. President Barbicane's proposal to build a nine hundred foot cannon and fire a projectile at the moon reads, inside the club, as a natural continuation of wartime engineering rather than a scientific departure from it.

Captain Nicholl, Barbicane's rival gunmaker turned bitter personal enemy over decades of competing armor and artillery patents, bets against the whole project succeeding, and Verne uses their feud to keep the satire pointed rather than diffuse: even a supposedly disinterested scientific triumph gets financed and narrated through the same grudges and one-upmanship that built the guns in the first place. Michel Ardan's late, flamboyant arrival, a French adventurer who insists on riding inside the projectile himself rather than merely calculating its trajectory from Baltimore, injects a romantic recklessness the club's engineers had carefully excluded, and Verne lets his charisma talk two men who nearly duelled each other into a lunar capsule together instead.

Verne researched the actual velocity needed to escape Earth's gravity closely enough that his numbers hold up reasonably well against real orbital mechanics, which is part of why NASA engineers have cited the novel as a startlingly close anticipation of the Apollo program's Florida launch site and splashdown recovery. But he also lets the premise's central absurdity stand unresolved: firing living passengers from a cannon would kill them instantly on ignition, a problem Verne simply declines to solve, treating the acceleration mathematics as more interesting than the acceleration's actual effect on a human body.