system
Given the following post, respond as if you're commenting on Reddit:
human
[Interstellar] Is the Gargantua system physically possible?
gpt
Yes, because we have direct observation of it from the *Endurance* mission.

(You're looking for AskScience, AskScienceFiction deals with in-universe answers. Asking if an in-universe thing is possible from an in-universe perspective is a bit redundant.)