The night sky above the world’s best observatories has long been prized for one thing above all: darkness. Now that darkness ...

Scientists in Japan have developed a high-resolution X-ray telescope sharp enough to distinguish an object just 3.5 mm wide from one kilometer away, by combining precision mirror-making technology ...

If the number of satellites in Earth's orbit exceeds 100,000, humanity may lose its ability to study the universe from the ...

The first 18 pieces for one of the European Southern Observatory’s Extremely Large Telescope (ELT) mirrors have started their 10,000 kilometer journey from France to Chile. It’s a key step on the way ...

India’s first liquid mirror telescope is up and running. It’s the first and largest liquid mercury telescope to be built at a high altitude, and if that isn’t impressive enough, it is also the first ...

The 1.7 million satellites that companies are aiming to launch into Earth's orbit in the coming years will have "devastating ...

At 8,040 feet above sea level (2,450 meters) in Uttarakhand, India, lies a prime site for astronomical observations — Devasthal, 31 (52 kilometers) miles east of the resort town Nainital. Surrounded ...

“Mirrors, mirrors on the Webb, who in the land is fairest of all?” project scientist Mark Clampin asked six of the mirrors to be built on the Webb Space Telescope ...

The International Liquid Mirror Telescope will use liquid mercury to give scientists a view of the sky, and observations are set to begin later this year. Reading time 2 minutes High in the Himalayas, ...

Scientists at the University of Arizona and in California have completed the most challenging large astronomical mirror ever made. For the past several years, a group of optical scientists and ...

For decades, engineers and planetary scientists have explored howorbital mirrors could be used to actively shape a planet’s ...