![Vlt Laser Guide Star Facility Photograph by European Southern Observatory/g. Hudepohl/science Photo Library Vlt Laser Guide Star Facility Photograph by European Southern Observatory/g. Hudepohl/science Photo Library](https://images.fineartamerica.com/images-medium-large-5/1-vlt-laser-guide-star-facility-european-southern-observatoryg-hudepohlscience-photo-library.jpg)
Vlt Laser Guide Star Facility Photograph by European Southern Observatory/g. Hudepohl/science Photo Library
![English: On 26 April 2016 an event at ESO's Paranal Observatory in Chile marked the brilliant first light for the four powerful lasers that form a crucial part of the adaptive optics English: On 26 April 2016 an event at ESO's Paranal Observatory in Chile marked the brilliant first light for the four powerful lasers that form a crucial part of the adaptive optics](https://c8.alamy.com/comp/2BAMC24/english-on-26-april-2016-an-event-at-esos-paranal-observatory-in-chile-marked-the-brilliant-first-light-for-the-four-powerful-lasers-that-form-a-crucial-part-of-the-adaptive-optics-systems-on-esosvery-large-telescope-attendees-were-treated-to-a-spectacular-display-of-cutting-edge-laser-technology-against-the-majestic-skies-of-paranal-these-are-the-most-powerful-laser-guide-stars-ever-used-for-astronomy-and-mark-the-first-use-of-multiple-laser-guide-stars-at-eso-this-spectacular-image-shows-the-four-beams-emerging-from-the-new-laser-system-on-unit-telescope-4-of-the-vlt-27-april-2016-2BAMC24.jpg)
English: On 26 April 2016 an event at ESO's Paranal Observatory in Chile marked the brilliant first light for the four powerful lasers that form a crucial part of the adaptive optics
ESO on Twitter: "Unit telescope 4 (called Yepun) at ESO's VLT sends up laser light to create an artificial guide star. This is part of the Adaptive Optics system at the VLT.
ESO Astronomy - Unit Telescope 4 (Yepun) of the VLT using laser light to create a guide star. Image credit: ESO Astronomy / Daniele Gasparri Photography (socsi.in/K0D0g) socsi.in/1ew5w | Facebook
![English: A laser beam launched from VLT´s 8.2-metre Yepun telescope crosses the majestic southern sky and creates an artificial star at 90 km altitude in the high Earth´s mesosphere. The Laser Guide English: A laser beam launched from VLT´s 8.2-metre Yepun telescope crosses the majestic southern sky and creates an artificial star at 90 km altitude in the high Earth´s mesosphere. The Laser Guide](https://c8.alamy.com/comp/2BAMBTP/english-a-laser-beam-launched-from-vlts-82-metre-yepun-telescope-crosses-the-majestic-southern-sky-and-creates-an-artificial-star-at-90-km-altitude-in-the-high-earths-mesosphere-the-laser-guide-star-lgs-is-part-of-the-vlts-adaptive-optics-system-and-it-is-used-as-reference-to-correct-images-from-the-blurring-effect-of-the-atmosphere-the-picture-field-is-crossed-by-an-impressive-milky-way-our-own-galaxy-seen-perfectly-edge-on-the-most-prominent-objects-on-the-milky-way-are-sirius-the-brightest-star-in-the-sky-visible-at-the-top-and-the-carina-nebula-seen-as-a-bright-patch-beside-2BAMBTP.jpg)
English: A laser beam launched from VLT´s 8.2-metre Yepun telescope crosses the majestic southern sky and creates an artificial star at 90 km altitude in the high Earth´s mesosphere. The Laser Guide
![The four laser guide stars of the Adaptive Optics Facility on VLT Unit... | Download Scientific Diagram The four laser guide stars of the Adaptive Optics Facility on VLT Unit... | Download Scientific Diagram](https://www.researchgate.net/profile/Tim-De-Zeeuw/publication/312091372/figure/fig2/AS:447367620108288@1483672160088/The-four-laser-guide-stars-of-the-Adaptive-Optics-Facility-on-VLT-Unit-Telescope-4.png)
The four laser guide stars of the Adaptive Optics Facility on VLT Unit... | Download Scientific Diagram
![Artificial Laser Stars At The Vlt Over Paranal iPhone X Case for Sale by F. Kamphues/european Southern Observatory/science Photo Library Artificial Laser Stars At The Vlt Over Paranal iPhone X Case for Sale by F. Kamphues/european Southern Observatory/science Photo Library](https://images.fineartamerica.com/images-medium-5/1-artificial-laser-stars-at-the-vlt-over-paranal-f-kamphueseuropean-southern-observatoryscience-photo-library.jpg)
Artificial Laser Stars At The Vlt Over Paranal iPhone X Case for Sale by F. Kamphues/european Southern Observatory/science Photo Library
![VLT UT4 (Yepun) shown with the LGSF laser beam propagated at Paranal.... | Download Scientific Diagram VLT UT4 (Yepun) shown with the LGSF laser beam propagated at Paranal.... | Download Scientific Diagram](https://www.researchgate.net/profile/Ronald-Holzlohner/publication/252132172/figure/fig1/AS:669080696655920@1536532677964/VLT-UT4-Yepun-shown-with-the-LGSF-laser-beam-propagated-at-Paranal-The-Galactic-Centre.png)