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

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 ...

The long-closed, 1920s-era observatory in Lake Angelus is important to astronomy buffs. But its private ownership has ...

Measuring distances across the universe is much more challenging than measuring distances on Earth. Is a brighter star closer ...

The journey of astronomical telescopes began in the early 17th century when Galileo Galilei crafted his first refracting ...

Details are emerging about the plant, whose proposed location in the Atacama Desert is concerning astronomers.

The scientific community is warning about a 3,000-hectare power plant that is jeopardizing the darkness of the skies over the ...

Stargazers across the country have their telescopes at the ready to capture a rare planetary event next month (February).

An artist's concept of NASA's Habitable Worlds Observatory, a flagship space telescope for the 2030s and 2040s to search for ...

The South African Astronomical Observatory in Sutherland is one of the world's leading sites for optical and infrared ...

NATIONAL HARBOR, Md. — A giant new telescope in Chile has opened its eyes for the first time — and while the view may not be ...