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This section contains descriptions of unexplained facts provided by eyewitnesses or published in the media, as well as the results of their analysis by the group.

UFO. Netherlands

ID #1700221199
Added Fri, 17/11/2023
Author July N.

Initial data

Initial information from sources or from an eyewitness
Incident date: 
16.11.2023 22:30

A green vertical line in the sky, motionless, was filmed over the city of Thiel.

An eyewitness writes:

A green vertical line in the sky. Pretty bright green. I didn't see any beginning or end that could point to a laser beam. He hung in the air for several minutes in silence.

The most likely explanation according to - Art project:

Despite the fact that it is many kilometers away, it still points to one of GLOW Eindhoven's works of art.

Original news

Groene verticale streep in de lucht, stilstaand. Zag er niet uit als een laser.

TIEL, GD — Groene verticale streep in de lucht. Best fel groen. Ik zag geen begin of eind wat kon duiden op een laserstraal. Hing stil in de lucht een aantal minuten lang.

Meest waarschijnlijke verklaring


Ondanks dat het vele kilometers verderop is duidt dit toch op een van de kunstwerken van GLOW Eindhoven.


List of versions containing features matching the eyewitness descriptions or material evidence

Light sources on clouds

Lasers, searchlights, car headlights and other light sources of sufficient power can form a column of light in a dusty or foggy atmosphere, various patterns on low clouds, fog or haze. Also, the rays can highlight parts of the cloud, objects or birds, giving them bizarre shapes.

Searchlights can shine with one beam, several. They can be stationary, move, and also form spinning carousels on the clouds, which can change shape and color.

It often seems that the light source is located at the point where the beam hits the cloud, and not vice versa.

Light (solar) pole

One of the most frequent types of halo, a visual phenomenon, an optical effect which is a vertical band of light stretching from the sun during sunset or sunrise.


Versions testing, their confirmation or refutation. Additional information, notes during the study of materials
Not enough information


The most likely explanation. The version, confirmed by the investigation
Not enough information

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