def __init__(self):
     PlanetarySystem.__init__(self)
     self.discovered_bodies = []
 def __init__(self):
     PlanetarySystem.__init__(self)
     self.discovered_bodies = []
 def __init__(self):
     PlanetarySystem.__init__(self)
     self.discovered_wormholes = []
 def __init__(self):
     PlanetarySystem.__init__(self)
     self.discovered_wormholes = []