nocturnal light (type of UFO)
Image from footage of a UFO taken by a BBC cameraman in July 2003 over Hanbury, Worcestershire, England. For more, go here (BBC)
A nocturnal light is one of the 6 categories of unidentified flying object (UFO) in the classification scheme devised by J. Allen Hynek in the 1950s. Defined as any light or lights in the night sky that cannot be explained in terms of aircraft, astronomical objects, or any other familiar luminous source.