Celestial Bodies (spacekernel.bodies)

CelestialBody(Time time)	Represent a celestial body with position and velocity in the Geocentric Celestial Reference Frame (GCRF) at a given epoch.
Moon(Time time)	Represent the Moon as CelestialBody with standard gravitational parameters and radius.
Sun(Time time)	Represent the Sun as a CelestialBody with standard gravitational parameters and radius constants.