def get_body_barycentric_posvel(body, time, ephemeris=None):
 return _get_body_barycentric_posvel(body, time, ephemeris)

def get_body_barycentric_posvel ( body , time , ephemeris = None ) : return _get_body_barycentric_posvel ( body , time , ephemeris )
calculate the barycentric position and velocity of a solar system body .