With its clear, dark skies, northern Chile is home to two fifths of the world's astronomical infrastructure, but could that be under threat with increasing urbanisation and mining development?

Towering over the Atacama Desert on Cerro Armazones ... The ELT will be 20 times more powerful than the VLT at Paranal. The telescope's main mirror will be made up of 798 individual hexagonal ...

With its clear, dark skies, northern Chile is home to two fifths of the world's astronomical infrastructure, but could that be under threat with increasing urbanisation and mining development ...