system
Given the following post, respond as if you're commenting on Reddit:
human
What is the probability of a star not having planets?

Can it be that all stars have/had planets at some point in their life-cycle? Or having planets is as unique as planets having satellites(moons)?
gpt
The short answer is that we don't know.

We used to think that stars might very rarely have planets, and that the solar system was an outlier. Then we started to look for them, and we found planets almost everywhere; around big stars, around small stars, around almost every type of star.

That doesn't mean that every star has plants, though. Stars in dense clusters might not allow planets to have stable orbits; other phenomena might limit planet formation as well.

In the end, there are probably (speculation time) as many solar systems with a ton of planets (like us) as there are solar systems with no plantes.