weightlessness

The travelers aboard the projectile suffer oxygen intoxication due to a valve malfunction, causing physiological disturbances and hallucinations. As they move away from Earth, they experience the gradual loss of weight culminating in weightlessness at the gravitational neutral point between Earth and the Moon. They reflect on the implications of weightlessness, speculate on the effects of reduced gravity on human strength and size, and marvel at the challenges and wonders of space travel.

Barbicane and his companions observe the projectile's elliptical orbit around the Moon and face uncertainty at the neutral point where Earth's and Moon's gravitational forces balance. Michel Ardan proposes using the projectile's rockets to alter their trajectory and attempt a lunar landing, but the maneuver fails, resulting in a terrifying fall back to Earth. Throughout, the travelers confront the physical realities of space travel and their impending fate with a mix of scientific reasoning, human resilience, and philosophical resignation.