Auxiliary telescope at Paranal Observatory, Cerro Paranal, Chile. This telescope is one of four secondary telescopes for the Very Large Tele

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Auxiliary telescope at Paranal Observatory, Cerro Paranal, Chile. This telescope is one of four secondary telescopes for the Very Large Telescope (VLT). The VLT comprises four mirror telescopes, the images of which combine to produce an image equal to that obtained by one 16 metre diameter mirror. This makes the VLT one of the most powerful telescopes in the world. The auxiliary telescopes allow observations while the main telescopes are in use. The VLT is operated by the European Southern Observatory. It is at an altitude of 2600 metres in the Atacama Desert, one of the driest places on Earth. This provides the VLT with excellent viewing conditions.

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Photo credit: © ADAM HART-DAVIS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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