Laser guide star, VLT, Chile
Laser Guide Star (LGS) launched from the Very Large Telescope (VLT) 8.2-metre Yepun Telescope and aimed at the centre of our galaxy, in the heart of the brightest part of the Milky Way, creating an artificial star in the Earth's mesosphere. This artificial star is used as reference to correct images and spectra., by ESO/PETR HORALEK/SCIENCE PHOTO LIBRARY
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