system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Can gravity decay over time? Why or why not?
gpt
No, gravity doesn't decay, at least not directly as a function of time.

Gravity is just a function of two things: the mass of two objects and the distance between them.  

So if we had two objects of fixed mass at a fixed distance and those properties never changed, the force of gravity between them would be the same today as it would be a trillion years from now.

Now, if one of those objects lost mass in any way, gravity would decrease.  If you moved one away from the other, it would decrease.  But neither of those really has to do with time.