that's right, asteroid spawning is disabled outside of the planetary rings - earth start sort of locks you out of that until you can make it to one of the 3 big gas giants (Borea, Notus, or Hesychia)

also i could not find any asteroids when i left the earth planet

Hi Locomotor, I'm not sure whether it is necessary to always have the planets pre-downloaded or not, but it will certainly help it load faster, so I added a download link to the collection at the bottom. Good idea!

Also, please note that this isn't a scenario in that it doesn't have any scripted events added. It's a survival world (or, if you change the settings, a creative world).

do you need the planets from this scenario to properly work
if so plz add them as mod list on the side