The massive dome measures 305 feet (93 meters) in diameter, or about the size of a football field and stands 263 feet (80 ...

close to Europe's existing facilities at Cerro Paranal, where an array of telescopes has been constructed. Engineers are slicing the top off the peak in preparation for the building of the telescope.

Beneath a breathtaking full Moon, construction on the world’s largest optical and infrared telescope—the ELT—progresses in ...