VLT and laser guide under stars

VLT and laser guide under stars

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Credit: BABAK TAFRESHI/SCIENCE PHOTO LIBRARY

Caption: VLT and laser guide under stars. One of the four telescopes of the Very Large Telescope (VLT) shining a laser guide at the Paranal Observatory, Atacama desert, Chile. This beam creates a guide star in the atmosphere, which is used to calibrate the telescope to remove the effects of the atmosphere on observations, a process known as adaptive optics.

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