system
Given the following post, respond as if you're commenting on Reddit:
human
Do Kepler's laws still hold in general relativity?

Newton's inverse square law was shown to be not quite accurate in describing planetary motion. Do some or all of Kepler's three laws of planetary motion hold up against general relativity?
gpt
In General Relativity, Kepler's Laws are demoted to being very accurate approximations. We still use them and use them, but we know that they're not the whole story.

However, even in Newtonian mechanics, Kepler's Laws are still technically an approximation. Kepler's Laws assume that all of the mass of the system is in a single central object. In reality, the orbit of the Earth is perturbed by other planets - Jupiter in particular. Ignoring these other objects still gives you a pretty good answer, but it is an approximation, and gives a small error.