What are NLC's?

Noctilucent clouds (popularly referred to by the abbreviation "NLC") are high atmosphere cloud formations thought to be composed of small ice-coated particles; their precise nature remains a mystery. They form at very high altitudes - around 82 km above sea level - and are, thus, a quite separate phenomenon from normal weather or tropospheric cloud.

Source of information: Noctilucent Cloud Observers' Homepage





27/28 of July 2001


3/4 of August 2000


NLC pics from here and there over the years.


NLC Links

Click here to see Stan Richard's NLC photos

Lichtende nachtwolken (

NLC - Links

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