This image may not be used by or to promote the arms, nuclear power or tobacco industries or any religious organisation, or in any discriminatory way,


This image may not be used by or to promote the arms, nuclear power or tobacco industries or any religious organisation, or in any discriminatory way, or to imply the endorsement by ESO of any product, service or activity Laser Guide Star Facility at the European Southern Observatory's VLT (Very Large Telescope), Cerro Paranal, Chile, being cleaned by a technician. Dust and debris will interfere with the accurate laser needed. This equipment (PARSEC) produces an orange laser light (seen here) to create a guide star in the atmosphere. This facility began operating on 28 January 2006, in the VLT's Yepun telescope. By focusing on the artificial guide star, telescopes at the VLT can be calibrated to remove the effects of the atmosphere on observations. This process is known as adaptive optics, and leads to improved :


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Photo credit: © EUROPEAN SOUTHERN OBSERVATORY/H. HEYER/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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