I would like some events that randomly effect the planet, here are some suggestions

A large meteor has hit the planet, the worlds research has been sabotaged however the remains have revealed a large source of minerals (new resource depends on the research before it, if the research was 15x mega rich the mining would be that plus the mining before it) (No change to artifact). This event can only happen to terra worlds and oceanic worlds and transforms it into a dying world (Like a volcanic, stroke oceanic, stroke terra world). This event can be prevented by destroying the meteor, if it has not been destroyed within 7 days then it crashes into the world (Can be speeded up with planetary vortexes)

A draft planet has floated close your world, it has started to orbit along with your small moon, your small moon has been upgraded to Large Moons and will increase the max space from 10% to 20%. If the planet has no small moons it will instead form a small moon.

-1 if I wanted a mining planet I would make a mining planet, it is 15x research for a reason. As far as pt2 goes, well y'know you could just use a transfuser... Small moons have to be there, getting them is a risk you run.

What about planets that are bad what happens to them.

Purgers

this seems extremely similar to a suggestion i made about meteors.