system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] If the Death Star blows up a planet, what happens to the planet’s moons?
gpt
As long as the debris stays inside the moon's orbit and is symmetrical, mostly nothing changes.

This is not likely, given the pyrotechnic nature of how this works. It's very likely that any moons lose the gravitational influence and move into larger and more unstable orbits. Their surfaces are bombarded with debris from the destroyed planet. They may drift towards other planets in the system, causing more instability that may lead to tsunamis and earthquakes on other planets in the system. Probably not much in the way of active collisions, but you may get other planets in the system swapping moons or moving their moons into different orbits with catastrophic long-term effects. Every planet in the system could be adversely affected.

So it just goes to show, you don't want to be in the same system as a planet buster.