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

ESO estimates the complex will leak as much light pollution as a city with a population of about 20,000. Parts of the ...

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 ...

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

The magnificent Andromeda galaxy (Messier 31), stands out as the most important nearby stellar island to our Milky Way, and ...

European Southern Observatory Director General Xavier Barcons told Space.com that astronomers expect the project to brighten the sky by up to 10 percent around the observatory.

Chile's Atacama Desert is home to some of the best Earth-based observatories, though an energy company is throwing a wrench ...

Light pollution from a planned renewable energy project in Chile could significantly impact the European Southern Observatory ...

Using IRAS and NuSTAR telescopes, scientists identify hundreds of obscured black holes hidden behind gas and dust.

A little-known chapter of the Hubble Space Telescope’s history is a reminder of the risks of looking at the sun ...

Lee Feinberg, HWO's principal architect based at Goddard, said in a separate presentation that NASA is currently envisioning ...