A 2001 reference in To aru Kagaku no Rilgun. But this is supposed to be slightly futuristic, so does that mean the Star Child has already been born? If that was related to the creepy baby monster from episode 12 then choosing the nuclear reactor makes sense now! Ah, but the novel was a novel after all, HAL can’t be real (he’s too huge for it, especially after Kuroko’s phone), and this IS an artificial enviroment after all.
Anyway…caught up with the series, it’s a lot of fun. Though I did quite a few facepalms at the whole ojou-samas-can’t-cook bit.