system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: how do the time differences between planets work in Interstellar?
gpt
It's a consequence of General Relativity.  It's called gravitational time dilation.  What it means is an object's mass (or it's ability to warp the space time fabric) will effect how that object experiences time compared to a difference reference frame.  The gravitational force of that planet is so large that for anything moving through that field time slows (it doesn't mechanically move slower) it just does compared to something else that is not in that gravitational field.