Quarter Size Real Solar System (2.5x Kerbin scale) Quarter Size RSS is a mod that uses the great work from @NathanKell and creates our Real Solar System in a smaller scale in KSP. At 1/4 the size of the Real Solar System, it is still 2.5 times larger than stock KSP and provides a huge challenge to players, but can be achieved with stock parts. It has been figured out by many people the 2.5x scale is the proper scale for KSP. With the way the engines and masses are configured, "realistically