How much planets can be put in 1 scenario without screwing the game up in lagg???
Depends on the hardware you use....
but its not like orbiter is limited to a certain number of maximum planets?
Right now I've got about 100 objects. I'm working on getting the bugs out of the Outer Planets addon for 2016, which would add about 100 more. I think I got up to 250 or so in Orbiter 2010-P1 before it started bogging down...
And with the Bogging down it went real slow and complicated?
Yes, I mean it startēd getting slow.
...4,294,967,296 objects in the scenario (that most probably includes all objects like vessels, bases and planets).
In other words, if there is a limit it's probably a lot higher than any current CPU can practically handle, or that the average user even has ram for. To run calculations for. How much you can put in there before it start lagging noticably therefore purely depends on the CPU of whoever runs the scenario.