Very Large Telescope Ready for Action
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Very Large Telescope Ready for Action

July 26, 2011
As the Sun sets in the north-western sky above the Chilean Atacama Desert, astronomical work is about to begin. This is home to ESO's Very Large Telescope, one of the most powerful astronomical devices ever constructed. It is located atop Cerro Paranal, a 2600-meter high mountain some 120 kilometers south of the city of Antofagasta.

This unusual 360-degree panoramic projection reveals the observing site from a fresh perspective. In the center of the image, staff at Paranal have gathered to watch the sunset. On the right, the enclosures of the VLT's Unit Telescopes can be seen: vast machines, each with a primary mirror 8.2 meters across and weighing 23 tons. Also visible are several of the smaller 1.8-meter Auxiliary Telescopes, which complement the Unit Telescopes. On the left of the picture is the control building, from where the telescopes are operated remotely during observations. No one remains inside the telescope domes after they are opened.

Since first light in 1998 the Very Large Telescope has been used by ESO astronomers to study the Universe, including some of the most exotic phenomena known, such as exoplanets, supermassive black holes, and gamma-ray bursts.

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