>[Leave it alone]
>[Attempt to feed science ships to it]
>[If we bribe it, maybe it wont eat us?]
Feed it?
Heck, maybe you could build some sort of observation base nearby. It's big enough to see with a telescope from a nearby system, probably. Just a silly thought, really.
Feeding it science ships
That's one way to gain Society research, voidwyrm biology through repeated sacrifice of (hopefully automated!) science ships.
In all seriousness though, it'd be cool if you could passively observe it. Maybe have a second chain of events where you can cooexist with it in a more peaceful manner - perhaps sacrificing the ability to mine the special system, but you might get other benefits over time? Maybe the wyrm's intelligent, and you can develop a way to communicate with it, and over time trust is built and you can incubate the egg without the need for a fight. Of course, there's also the side effect that its population increases :>
I like the Infinity Sphere guardian for this reason, in that you can interact with it in more ways than just "shoot at it!" - but you do still have that option