Dozens of boxes holding mirrors are placed along a remote desert hill in northern Chile as workers make progress in the ...

The European Southern Observatory's (ESO) Extremely Large Telescope (ELT) — the world's largest visible- and infrared-light ...

Astronomers are sounding alarm bells as the world's most precious sky-observing location faces a risk of being blinded by ...

Astronomers are raising concerns about the impact of light pollution from a renewable energy project on the world’s most ...

Giant ground-based reflector telescopes do much of astronomy's heavy lifting, although the U.S.'s largest in Hawaii is not ...

European Southern Observatory Director General Xavier Barcons told Space.com that astronomers expect the project to brighten ...

Astronomers have been battling threats to their clear skies on all fronts lately. One of the most notable battles, which we ...

Astronomers sound the alarm as a proposed renewable hydrogen project in Chile threatens to disrupt the pristine night skies ...

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 ...

Credit: ESO/S. Lowery Once completed toward the end of this decade, ELT will be the world's largest telescope studying the universe in visible light, featuring a 130-foot-wide (39.3m) mirror.

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) ...