Hello, I don't know if star bonuses are suposed to be applied to planet production per hour, but it's not working, only the bonus from the planet type is working.
Not all stars have bonus properties, some works negatively on your planets. If your star gives bonus resource, you can check it at Resource page.
Expedition slot are increased by Officiers or Expedition Technology
And how can we increase the expedition slots?
I know that, but it's bugged, go do the maths. star bonuses, positive or not don't influence the end result, only officer and planet bonus works.
Adressed and fixed with last update.