Naturwissenschaften: VLT-the-Very-Large-Telescope-exterior-

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(Naturwissenschaften): VLT the Very Large Telescope exterior view of 2m4 AT Auxiliary Telescopes sited on flattened mountain top at Cerro Paranal Chile 1 AJHD.jpg
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vlt = Very Large Telescope = The Very Large Telescope (VLT) is the world's biggest optical telescope. It has four 8-metre telescopes and four 2.4-metre Auxiliary Telescopes (ATs). They sit on a flattened mountain top at Paranal in Chile. They use adaptive optics to eliminate some of the effects of turbulence in the atmosphere, and when they can't use a bright star they create their own by shining a sodium laser upwards to excite sodium ions in the ionosphere---the laser guidestar. See site information on the ESO at Cerro Paranal.

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VLT-the-Very-Large-Telescope-exterior- - Very...

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