“Project Hail Mary” is the most exasperatingly insistent crowd-pleaser I’ve seen in a while. It serves up an elaborate science-fiction plot in easily digestible bites, often with a juicy one-liner or a side order of pratfall. Both the title and the quippy-wonky tone come from an Andy Weir novel, from 2021, and, like the book, the film uses Grace’s temporary amnesia as a structuring device. We are jerked between past and present as his backstory gets filled in, one jogged memory at a time. Early on, we flash back to Earth, where Grace is teaching junior-high science; his latest lesson is about sound frequencies, and you can rest assured that it will appear on the film’s midterm exam. There’s a pre-apocalyptic chill in the air. The sun is being devoured by energy-hungry microbes, called Astrophage, and the resulting cooling threatens to wipe out much of Earth’s population. This isn’t just a local problem; the Astrophage are eating stars everywhere, like ants at an intergalactic picnic. Lights out for the universe.