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New Video Showing Construction Of The World’s Largest Telescope

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Construction is underway at Cerro Armazones – the future home of the Extremely Large Telescope (ELT). When construction is done the ELT will be the largest optical telescope​ ever built — a dome the size of a cathedral.

The ESOcast Light is a series of short videos bringing you the wonders of the Universe in bite-sized pieces. The ESOcast Light episodes will not be replacing the standard, longer ESOcasts, but complement them with current astronomy news and images in ESO press releases.

Present and future observatories compared to a marvel from the past. The E-ELT dome will be 100 metres in diameter, about the size of the Colosseum in Rome, but atop a 3000-metre mountaintop. For comparison, each of the four VLT unit telescopes are 25 metres high, about the size of an eight-storey building. This picture is based on a preliminary design for the E-ELT.



 

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