Project Hail Mary
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Project Hail Mary

Andy Weir

4.1496 learners

Dr. Ryan Grace wakes up adrift in deep space, amnesiac and surrounded by the corpses of his crew, with no clue how he got there. As his memories slowly return, he learns he’s aboard the *Project Hail Mary*—a suicide mission to save Earth from Astrophage, an alien organism draining the sun’s energy. When he discovers Rocky, a fellow alien survivor from a star system facing the same crisis, the pair form an unlikely bond. Together, they race against time to uncover Astrophage’s natural predator, navigate deadly space hazards, and confront unexpected twists like evolved Tau Worms that threaten their mission. In the end, Grace faces an impossible choice: return to Earth as a hero or sacrifice his chance to save his only friend. This witty, heart-pounding sci-fi adventure blends hard science with heartfelt friendship, proving connection is the greatest force even in the vast void.

AstrophageTau WormRyan GraceRockyProject Hail Mary
Scenario

10km Chain Sampling Mission

Grace and Rocky make a 10km long xenonite chain, drag it down to Tau Ceti e's lower atmosphere to collect samples and find Astrophage's natural predator.

ExperimentSci-FiAdventure
Scenario

Tau Ceti E Biosphere Found

Grace and Grace discover Tau Ceti e has a complete, thriving biosphere, which is the exact reason that Astrophage never ate the Tau Ceti star.

Sci-FiDiscoveryExoplanet
Concept

Tau Ceti Ceti Predator

A tiny amoeba-like organism native to Tau Ceti e, which feeds exclusively on Astrophage and keeps the Tau Ceti star system safe from infection.

Sci-FiAlien LifePredator
Scenario

First Contact With Rocky

Grace spots a weird alien spaceship near his craft in Tau Ceti system, and sends a 3-short-1-long engine signal to test if intelligent life is on board.

First ContactSci-FiAlien
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