Sun-Eating Microorganisms, Is It Possible in Reality?… the Science in the Movie ‘Project Hale Mary’

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Ryland Grace, the protagonist of the movie *Project Hale Merry*, wakes up in a spaceship having lost her memory and belatedly discovers that she has been assigned a mission to the star system *Tau Ceti*, outside the solar system, to stop unidentified space microorganisms threatening the sun. *Project Hale Merry* introduces various scientific concepts at once, including microorganisms that dim the sun, spacecraft propulsion using neutrinos, long-…

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"Microbes grow quickly. I can imagine that these astrophages would have an unlimited source of energy once they reach a new star."