Observatories in Chile’s Atacama Desert, including the world’s largest optical telescope, could be blinded by light pollution and other unwanted side effects from the proposed construction of a renewa ...

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

Earlier this year a simple indicator LED brought the Keck 1 telescope, a 370 tons mass, to a halting stop. How exactly did an LED do this? Simple: it did nothing. As it so happens, [Andrew Cooper ...

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

NASA wants to view the Big Bang with this behemoth, so it's saying goodbye to the James Webb Telescope. The new one redefines ...

Giant Magellan Telescope The GMT is one of several large ground-based optical telescopes in development. Situated high and dry in Chile, it will have seven primary mirror segments, each over 26 ...

Construction of the world's largest telescope moves forward with ... with the warm glow of the sun rising over the optical telescope. If all goes according to plan, the anticipated development ...

Boasting a massive 34-foot-wide (10.4-meter-wide) segmented mirror, the Gran Telescopio Canarias is currently the largest optical-infrared telescope in the world. The enormous telescope is perched ...

Construction began Wednesday, Nov. 11 on what could become the world's largest optical telescope. The 22-story Giant Magellan Telescope (GMT), now being built in a desert atop a mountain in Chile ...

Katherine Laliotis is a freelance science writer and Ph.D. candidate in astrophysics. She often covers stories at the intersection of science and society.

When fully assembled, M1 will be the largest mirror ever built for an optical telescope. Breaking space news, the latest updates on rocket launches, skywatching events and more!