def METHOD_NAME(self):
    """
    Specify what celestial object is causing an eclipse message.
    """
    self.eclipseObject.ModelTag = "eclipseObject"
    self.eclipseObject.sunInMsg.subscribeTo(self.gravFactory.spiceObject.planetStateOutMsgs[self.sun])
    # add all celestial objects in spiceObjects except for the sun (0th object)
    for item in range(1, len(self.gravFactory.spiceObject.planetStateOutMsgs)):
        self.eclipseObject.addPlanetToModel(self.gravFactory.spiceObject.planetStateOutMsgs[item])