
With no time to train a replacement, Stratt asks Grace to join the mission. Stratt tasks Grace to train the science experts for the mission, but the science experts are killed in an Astrophage-induced explosion shortly before launch. Since the crew of three astronauts will travel under a coma to avoid psychiatric issues, potential astronauts are restricted to people with coma-resistant genes, including Grace. Stratt orders the release of methane from Antarctica to reduce global cooling, but the threat of famine and wars over food on Earth remains for the 26 years that the Hail Mary mission is expected to take. Hail Mary can only be fueled and supplied for a one-way trip, making it a suicide mission. An Astrophage-fueled starship, the Hail Mary, is developed to travel to Tau Ceti to obtain knowledge of Astrophage resistance, and to return the findings to Earth with unmanned mini-ships ("beetles", with each named after their respective Beatle counterpart). Other scientists discover that Astrophage employs mass–energy conversion via neutrinos, and can be mass-bred for use as rocket fuel.Īstronomy data reveals that Astrophage has also infected and dimmed nearby stars, but one star, Tau Ceti, has unexpectedly resisted Astrophage infection. Grace subsequently discovers that Astrophage reproduces using carbon dioxide, commonly found on Venus. Since the organism consumes energy from the Sun, Grace names it "Astrophage" ( Greek for "star eater"). He discovers that the single-celled organism consumes all forms of electromagnetic radiation and uses radiant energy to move. Stratt nominates Ryland Grace, a teacher and former molecular biologist, as the first person to study a sample of the organism recovered from Venus, as she views him as expendable. The world's governments cooperate, giving former European Space Agency (ESA) administrator Eva Stratt unilateral authority and legal immunity to solve the problem. A space probe is used to discover that the line appears to contain alien microbes. The exponential rate of dimming is calculated to result in a catastrophic ice age within 30 years.

In the near future, a global dimming event is observed, coinciding with the formation of a bright line from the Sun to Venus. This story is frequently intercut with flashbacks revealing earlier events leading up to the launch of the Hail Mary. Starting with the story on board the spacecraft Hail Mary where Ryland Grace regains his memory in bursts. The story follows two storylines, each told chronologically.


Drew Goddard (who adapted The Martian, Weir's traditional publishing debut, into a 2015 film) is slated to adapt the book into a film, in which actor Ryan Gosling plans to star as Grace. Film rights have been purchased by Metro-Goldwyn-Mayer. The unabridged audiobook is read by Ray Porter. It received generally positive reviews, and was a finalist for the 2022 Hugo Award for Best Novel.

He gradually remembers that he was sent to the Tau Ceti solar system, 12 light-years from Earth, to find a means of reversing a solar dimming event that could cause the extinction of humanity. Set in the near future, it centers on junior high (middle) school-teacher-turned- astronaut Ryland Grace, who wakes up from a coma afflicted with amnesia. Project Hail Mary is a 2021 science fiction novel by American novelist Andy Weir. 2021 Dragon Award for Best Science Fiction Novel
