code: def bb(self,*args,**kwargs):
          
          out= self._orb.bb(*args,**kwargs)
          if len(out) == 1: return out[0]
          else: return out
docs: NAME:
  
             bb
  
          PURPOSE:
  
             return Galactic latitude
  
          INPUT:
  
             t - (optional) time at which to get bb (can be Quantity)
  
             obs=[X,Y,Z] - (optional) position of observer (in kpc; entries can be Quantity) 
             (default=[8.0,0.,0.]) OR Orbit object that corresponds to the orbit of the observer
             Y is ignored and always assumed to be zero
  
             ro= (Object-wide default) physical scale for distances to use to convert (can be Quantity)
  
          OUTPUT:
  
             b(t) in deg
  
          HISTORY:
  
             2011-02-23 - Written - Bovy (NYU)