Lasers in the night

ESO's Very Large Telescope (VLT) counteracts the blurriness of stars caused by the atmosphere through use of the 4 Laser Guide Star Facility (4LGSF). The 4LGSF sends four laser beams into the skies to produce four artificial stars by exciting sodium atoms located in the atmosphere at an altitude of 90 kilometres. These stars act as reference points to artificially remove the twinkling of stars.


ESO/Daniele Gasparri (

About the Video

Közzététel napja:2019. február 27. 11.02
Időtartam:12 s
Frame rate:30 fps

About the Object

Név:Laser Guide Star, Very Large Telescope
Típus:Unspecified : Technology : Observatory



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