Making New Worlds

[GreatWyrmGold]

How would one make new planets, moons, or whatever for the Kerbolal system? I know it's possible, and it seems like an idea with a wide array of potential ideas that haven't already been done by people with far more skill in all relevant areas. Hence, I've often considered learning how to do so. I have a few questions on the subject.

1. Does anyone have any general advice? How the planets are coded, where they're stored, general things like that?

2. For making the shape, and ideally the texture, would a tool like this work? If not, what would I need to do?

3. For future reference (once I get into advanced projects), is it possible to give planets unique resources a la kethane?

Keep in mind that I'm pretty new to the whole modding thing. I have some vague idea of what can be done, and have a little experience with programming, but I don't know much more than my own ignorance.

Thanks in advance for any help you can give.

[UbioZur]

I guess you will need to have a look at tools like planet factory.

[GreatWyrmGold]

Huh. I thought that was just a package of planets. That is more helpful than I had anticipated! Thank you!