Kerbin is the home planet of the Kerbals and the main focus of Kerbal Space Program. It is also the Earth analog for the game and has two moons named Mun and Minmus. Kerbin is the third planet in orbit around the star Kerbol. It is the third largest celestial body that orbits Kerbol, following Jool and Eve. Jool's moon Tylo has the same radius of Kerbin, though it may be classified as larger, as the highest point on Tylo is about 5 km higher than the highest point on Kerbin. However, Tylo has only 80% of Kerbin's mass.