(self)
return list(self._planets.values())
:return: List of all planets
        :rtype: list[entity.Planet]
:return: List of all planets
        :rtype: list[entity.Planet]
: return : List of all planets : rtype : list [ entity . Planet ]
def all_planets(self):
        """
        :return: List of all planets
        :rtype: list[entity.Planet]
        """
        return list(self._planets.values())
def all_planets ( self ) : return list ( self . _planets . values ( ) )