Jupiter, Mars, Venus and Saturn are all visible with the naked eye in our night skies right now - but one planet will join ...

A brilliant comet waved its tail above the site of the world's largest telescope as it lit up the night sky last month.

Tucson's new ‘Astro Trail' is a collection of national parks, state parks, observatories, and planetariums, that offer a ...

One photographer put the age of starlight into perspective with stunning projections on some of Earth's oldest rock ...

Featuring the world’s largest digital camera, the Vera C. Rubin Observatory will capture these mysterious phenomena in more ...

The city of Flagstaff has taken big steps to preserve the clarity of its night sky. Find out the best ways to experience the ...

The desert city in southern Arizona is a sanctuary for stargazers—and now it's even easier for visitors to explore.

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the ...

one of the world's foremost observers of solar eclipses. (Robert McMath wrote in Curtis' obituary in 1942 that he was "constantly" in touch with Curtis about the observatory and that his influence ...

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