I’ve been on a cosmic horror kick lately, and what I’d really like to read is stories or novels of the awful and unfathomable on a spaceship. Stories where we go to them, poke what shouldn’t be poked, scan what shouldn’t be scanned, and things proceed from there.
I haven’t read the book, but watched the movie. I think Event Horizon might be what you’re looking for.
I’ve heard references to these sorts of stories in the 40k universe, but again I haven’t read the books.
There’s a theory that Event Horizon happened in the distant past of the WH40k universe.
Event Horizon is much better if you pretend it’s a prequel to WH40K.
I think because of the coincidence between both Event Horizon and ships in 40k running into ‘chaos’ in the warp.
But as much as people keep making the parallel, it is just as likely that both drew their ideas from H.P. Lovecraft’s ideas of what lies beyond what we know as spacetime in our comfortable sphere.