![]() All the orbits are perfectly circular (see picture) and isn't realistic, and won't get you very far on having things collide and get bigger.The way I normally fix this is to play the simulation for a bit (Hopefully it's been paused this whole time, as having it unpaused makes things harder and gives different resuts) and as it plays, constantly be playing with the "+2% velocities" and "-2% velocities" buttons under powers>more. Now, until this point, you've hopefully been using auto-orbit option to place the "moons". (Note: in the picture, I only show the placement of inner solar system bodies, as I don't normally place those outer ones for the same reason I don't use large stars) In the picture below I have shown where I normally "put" my earthlike planets around brown dwarves (Only, in other types I put them in the habitable zone of the star)īut why there? Why would I put them in some arbitrary spot rather than in the habitable zone of this brown dwarf? That is because Universe Sandbox currently does not calculate habitable zones for brown dwarves, so I approximate where it might be if it did. The denser you pack these planetesimals, the greater the mass of the planet in that region will be.I typically have the most tightly packed part of the system nearest to the center, as many of these objects will be knocked out of the system or into the star/brown dwarf in a later step.Also, try to keep the number of "moons" at around 30 whrever you want an earth-sized planet, as I've noticed that most of these "moons" are about 2 moons in mass, give or take some tenths. The placement of "random moon"s will give your planets their mass as they collide and become larger. ![]() So, in conclusion to this section, I recommend using a Brown Dwarf of Red Dwarf star, and if you don't, remember to turn the luminosity of the star to zero. Also, another reason I don't tend to use larger stars is that the system in general is much larger, and so the likelihood of a collision goes down, therefore making you wait longer for things to become more stable and more like a fully-formed star system. The reason I say this is so that when you're placing your planets to form, they will actually collide and get larger instead of heating up and disappering before ever hitting anything else. ![]() I recommend using either a very low end M-class star (the smallest and reddest stars) or a brown dwarf (a very, very large gas giant, preferably above 70 Jupiters in mass) You can, technically, start out with other sized stars but I recommend that if you insist on doing so, turn realistic off, and the luminosity to zero. First, quite obviously, you will need to place a star for objects to revolve around.
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