PLEASE READ THIS:
About
Kopernicus is a KSP add-on that allows for modification of stock planets and the creation of new planets via modification of the system prefab. Why is this advantageous you might ask? Previous planet adder mods, such as Planet Factory, modified the live planetary system and had to keep multiple hacks actively running to provide these worlds. We strive to provide the least hacky solution by introducing planets into the game in the exact same manner Squad would.
If that was true, Kopernicus would have died with KSP 0.25 or so, because its original creators left. If noone else would have a say, I would never have been able to fork it and start working on improving it. @Dragon01 also gave the example of PlanetFactory which scratches the same itch. As long as it stays respectful, people who want to advance independently from the main developer should not be silenced just because it might annoy the main developer.
The license explicitly allows forking,