I remembered one more, just a very short story, nothing as exciting as the books:

EDIT (Thanks @yeellow): Pilot Pirx => Ijon Tichy (how could I mix them up? Well, it's been two decades or so since I last read them)

- ~~Pilot Pirx~~ Ijon Tichy series: I remember a short story from the "Ijon Tichy" series of stories (https://en.wikipedia.org/wiki/The_Star_Diaries): It started with a microphone being lowered to onto the surface of an extremely hot planet (hotter than Venus) and a conversation was recorded, I think it was a student and a teacher, or it was between scholars of that alien race. Of course, already it is clear that this wasn't about any reality-based-fiction, the whole setup was just to show human thought in a mirror by letting the conversation come from aliens. In the conversation the rogue (student? scientist? I don't remember) proposes that there could be life on planets that are much colder than their own. This obviously preposterous idea (haha) is shot down by the other party in the conversation and exposed as silly nonsense contradicting science (of that hot world).

By the way, unrelated to the current subject but possibly one of the best stories ever written, is the Ijon Tichy story where he is alone in his space shit and a tiny meteor destroys the controls. It takes two people to repair the damage though, one inside, one outside the space ship - simultaneously. He knows about some time altering vortexes and manages to fiddle with the engines to fly through them. Each time he flies through one of those vortexes there are multiple versions of himself on the space ship, for example his Wednesday and his Saturday version. The story is about his difficulty recruiting himself for the repairs. It's hilarious! It starts with him waking in the middle of deep sleep because somebody who looks like him is shaking him. In his sleepy state he forgot all about the time vortexes and he thinks he's dreaming. So he refuses to move because "damage repaired during a dream is not really repaired, so I may as well just keep sleeping". The next day he has the exact opposite problem: He finds himself sleeping and tries to convince his previous-day version to do the repairs together, without success of course. That's just the start though, more and more versions of himself appear and disappear...

EDIT:

Found the time vortex story (in full): https://english.lem.pl/works/novels/the-star-diaries/154-the...