act on any time scale from short term, commensurable with the orbit periods, to secular, measured in 104 to 106 years.
List of Internet phenomena | National Secular Society | Enlightenment in Western secular tradition | Secular clergy | Secular phenomena | Secular Order of Discalced Carmelites | Secular Humanist League of Brazil | Secular Franciscan Order | Secular Coalition for America | secular clergy | National Investigations Committee on Aerial Phenomena | A halo phenomenon observed over the South Pole. Featured in the photo are several distinct phenomena: A '''parhelic circle''' (horizontal line), a 22° halo |