Okay, the mod includes:
Real Fuels (no cryogenic fuel vaporisation though due to my complete lack of experience in compiling code)
Realistic Batteries
Realistic Wing and Structural tensile strengths
(If installed manually) Realistic physics
Realistic stock planet atmospheres
Semi-realistic new planets such as:
Minth, Veste, Ganymede and Sedna*
Realistic stellar objects (Blackholes, Stars)
*Ganymede and Sedna are also real planets but I couldn't think of a planet name.