Project Hail Mary: Chapter 20 Summary & Analysis

The ship spins out of control, crushing Ryland against a broken console as the centrifuge generates dangerous g-forces. With great effort, he crawls to the navigation panel and manually extends the ship’s cables to increase the radius and reduce the centrifugal force. It works—the gravity eases enough for him to breathe and move again, though the ship is now upside down and chaotic. Debris litters every surface, and Rocky lies motionless, overheated and unconscious from the earlier disaster. Ryland knows he has to move him before it’s too late.

Climbing through the inverted ship, Ryland straps Rocky’s heavy body to his shoulders using safety tethers, dragging him through the lab and into the dormitory. His burns worsen, and his body screams in protest, but he doesn’t stop. Rocky risked everything to save him, and now Ryland feels he must return the favor. He hauls the alien into the airlock, only to find his control panel destroyed. Desperate, he uses an emergency lever to release ammonia from Rocky’s compartment into the airlock, creating a survivable environment for his friend. But the price is steep: Ryland’s body is blasted with superheated ammonia, leaving him burned, gasping, and barely conscious before the medical system sedates him.

Ryland wakes hours later, wrapped in bandages, his lungs raw and his arm scorched. Rocky still hasn’t moved. Unsure if he’s alive or dead, Ryland turns to his notes on Eridian biology and realizes that Rocky’s radiator organ likely ignited when exposed to oxygen, filling his body with soot and oxidation. It’s damage that could take too long to heal—if it’s survivable at all. Praying that there is a chance, Ryland decides to act. He builds a sealed steel box fitted with a high-pressure air pump, a camera, and a drill, all cobbled together from ruined equipment in the lab.

Mounting the box to the wall of the airlock, Ryland drills into the xenonite and blasts Rocky’s vents with compressed Eridian air. It’s a gamble, but it works—black soot bursts from Rocky’s carapace as the pump clears the blockage. Ryland systematically sweeps the vents, trying to restore the damaged cooling system without doing further harm. When the dust finally stops, he powers down the pump. Then, he reinforces the seal with secondary and tertiary containment boxes to guard against ammonia leaks.

With Rocky still unresponsive, Ryland turns back to the lab. He recreates the environment of Adrian’s atmosphere in a makeshift chamber, hoping to keep their collected Astrophage sample alive. As the cotton swab inside the chamber begins to change, he documents everything, setting up time-lapse footage and taking photos. Pain surges through his arm, and the ship remains half broken, but Ryland focuses on what he can control. He’s done everything possible to help his friend. Now, all he can do is wait.