And to paraphrase Douglas Adams, the stuff is basically just a rounding error in the not-stuff. And insofar as there is stuff, it's all stars, with everything else being a rounding error. This is the case in our solar system, which, mass-wise is the Sun, with Jupiter as a rounding error - everything in the Solar System that isn't the Sun is mostly Jupiter.

https://en.wikipedia.org/wiki/List_of_Solar_System_objects_b...