Is there a way to create new planets with or without the use of mods? Like, is there a file I can make/add to add another planet to the the solar system? And if so, how can I make new terrain and add atmosphere and orbit and things like that?

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    @PTwr That still doesn't make asking for one on-topic. – Frank Feb 7 '17 at 13:58
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    @Jutschge Recommending mods in answers is fine. Specifically asking for mods that meet certain criteria is still seen as a recommendation question, which is off-topic. If there's a specific problem that is trying to be solved, we still allow it, just edit it to remove the mod request. A question that specifically asks for mods that do X don't really surface a problem, thereby don't have anything for us to solve. – Frank Feb 7 '17 at 14:12
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    That said, I'm not sure this is a mod rec; part of it definitely assumes mods are the only way to go about it, but only part of it. If it does get closed, though, I'm not going to contest it. – Frank Feb 7 '17 at 14:25
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    @TimmyJim I'm not asking for a mod recommendation. I'm looking for a way to create my own planets. I know about the Kopernicus mod, I just want to be able to make a planet freehand for a challenge I want to do. – Justin Jung Feb 7 '17 at 15:00
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    @JustinJung default planets are "hardcoded", no easy way to edit them (thats why Kopernicus was made). You might be able to edit their orbits and maybe some parameters with Hyperedit, but it still is one mod or another. – PTwr Feb 7 '17 at 15:34

Use Kopernicus mod to change or add new planets to game.

Kopernicus is framework for loading new and modifying existing planets. Its data files are based on Module Manager patches. It will take care of orbit, gravity, atmosphere and so on. Textures are simply .dds files.

You can find bunch of examples on Kopernicus Github page or just look on existing planet packs.

While small modifications are quite easy, all you need is notepad, creating fully functioning planet takes a while. New planet mod requires:

  • Orbit, parent body, atmosphere height and density curve, temperature gradient, and so on. All can be done in mm patch files.
  • Height map, textures, biomes, science definitions.

You can find a lot of tutorials on KSP official forum, but be sure to check for which version of KSP/Kopernicus it was made.

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