User blog comment:Mrob27/Astronaut Wrangling/@comment-4728735-20120106075019/@comment-4583259-20120115063010

I should probably try it again in another game or two... I've built those pits in 3 different games. One caught a bunch of astronauts, another got nothing (but I've never seen any astronauts in that game at all, ever. An astronaut-free moon, planty of other mobs, just no astronauts.) In the third moon, I got lots of astronauts but I wasn't building the pit specifically for the purpose of catching astronauts, it was just an unexpected side effect.