Star trails and laser beams over Cerro Paranal (stacked long exposure image).Aerial view of the Very Large Telescope Interferometer (VLTI) at Cerro Paranal in Northern Chile. The VLTI is a telescope system operated the European Southern Observatory (ESO) that combines light from multiple telescopes. It includes four 8 meter Unit Telescopes and four 1.8 meter Auxiliary Telescopes.The Very Large Telescope Interferometer at sunset.The four lasers of the Very Large Telescope at Cerro Paranal in ChilePanorama of the Extremely Large Telescope at Cerro Armazones in Northern ChileLaser beams in the VLT Unit Telescope 4 (UT4) project artificial stars to measure and correct for atmospheric turbulence.The Simons Observatory is a powerful new experimental cosmology facility comprising a set of millimeter-wavelength telescopes located at high-altitude in the Atacama Desert of Northern ChileLa Silla Observatory.Four laser beams project out into the night sky from Unit Telescope 4 (UT4) of the Very Large Telescope (VLT).Sunset over Maunakea. From left to right: Subaru, Keck 1, Keck 2, NASA IRTF.Spherical panorama of the Anglo-Australian Telescope (AAT).Laser Guide Stars emitting from the Very Large Unit Telescope 4 (VLT UT4) on a full Moon night.Full Moon rise over the NASA IRTF and CFHT telescopes on Maunakea.Panorama of Maunakea observatoryView on the primary mirror of the Keck 2 telescope.The Very Large Telescope (VLT) on the 2600-metre-high Cerro Paranal is located in the Chilean Atacama desert. The VLT offers the possibility of combining coherently the light from the four Unit Telescopes (UTs) to work together as an interferometer, creating images with unprecedented resolution.The night sky over Maunakea is amazing. From left to right in the image: Magellanic Clouds, the Milky Way, green airglow in the upper atmosphere and the Subaru and Keck 1 and 2 telescopes.Spherical panorama of Gemini South.Panorama of Maunakea. From left to right: NASA IRTF, CFHT, Gemini North, UH2.2m, UKIRT, UH0.9m, CSO, JCMT, SMA, Subaru, Keck 1, Keck 2.Inside the dome of the Very Large Unit 4 Telescope (VLT UT4).The Very Large Telescope Interferometer Delay Lines are located underground on Cerro Paranal. They regulate the light path of the telescopes to within a few nanometers (about 1/10.000th of the thickness of a human hair).Subaru telescope.Simons Observatory at night
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