Caelum Incognitum — The interactive encyclopedia of ufology

Nocturnal lights (NL)

Classifications & scales

The first of three categories of distant sightings (“Nocturnal Lights”, “Daylight Discs”, “Radar-Visual”) described by Allen Hynek in The UFO Experience (1972): lights seen in the night sky with no discernible shape. It is the most frequent type of report and the most prone to confusion with planets, aircraft or satellites.

In the major cases

• The Evald Maarup Sighting (1970)
• The Tocopilla Sighting (1971)

See also

• Daylight discs (DD)
• Radar-visual (RV)
• J. Allen Hynek (1910-1986)
• Acronyms to know
• Autokinetic effect
• Searchlights, lasers and aerial advertising
• Aircraft seen head-on
• Pine Bush (New York)

Back to the map