docs: def transitingPlanets(self):
          """ Returns a list of transiting planet objects
          """
  
          transitingPlanets = []
  
          for planet in self.planets:
              try:
                  if planet.isTransiting:
                      transitingPlanets.append(planet)
              except KeyError:  # No 'discoverymethod' tag - this also filters Solar System planets
                  pass
  
          return transitingPlanets