system
Given the following post, respond as if you're commenting on Reddit:
human
[Interstellar] why didn't NASA's best scientists realize that the messages coming from the tidal wave planet were also subject to huge time dilation?
gpt
The theory of time dilation is one thing, but actually applying it is another. When they get away from the planet someone says something to that effect: "we should have known, we should have realised this happened".  
The fact that they kept getting the all clear signal (although it turned out that it was just the same signal over and over again) for a very long time made it look like the astronaut had been there for a long time.