NASA Scientists Weigh In: Is 'Project Hail Mary' Realistic?

The hit film "Project Hail Mary" shows a lone astronaut on a desperate mission to save Earth. But how much of its thrilling science is based on fact? We asked NASA engineers and astrophysicists to separate science from fiction. They confirm the movie's central crisis—a star dimming and cooling Earth—is a real concept called "stellar dimming." However, the sun's behavior is very stable. Such a sudden change is not considered possible. The film's depiction of space travel uses accurate physics. The spin of the spacecraft to create artificial gravity is a proven idea. The use of a "gravity slingshot" around planets to gain speed is a standard NASA technique. A key plot point involves life thriving on a planet with very high gravity. Scientists say this is highly unlikely. Complex lifeforms, as shown, would probably be crushed. Overall, experts praise the film. They say it uses real science as a foundation for its story, making the fictional adventure feel surprisingly possible.