The European Southern Observatory's (ESO) Extremely Large Telescope (ELT) — the world's largest visible- and infrared-light telescope — is currently under development on the Cerro Armazones ...

The frame of the dome that will house the world's largest telescope has been completed, marking another key milestone in the observatory's construction. The European Southern Observatory's (ESO) ...

After all, a telescope is nothing more than a large monocular, so whether you buy one or the other for astronomy, it will be down to affordability and portability. Monoculars may not be ...

Very Large Telescope (VLT). VLT, which cost some $350 million to build in the 1990s ($840 million in today's dollars), is one of the world's most sensitive sky-watching instruments, capable of ...

Four bright lasers, the most powerful ever put on a telescope, fire into the night sky to create an artificial guide star for the European Southern Observatory's Very Large Telescope at the ...

A brilliant comet waved its tail above the site of the world's largest telescope as it lit up the night sky last month. Comet C/2024 G3 (ATLAS) soared through the starry skies above the European ...

Typically large telescope construction and operation costs scale up faster than their collecting area. This slows scientific progress, making it expensive and complicated to increase telescope size.