A decently dark site in a rural area has a sky background of about 21 mag/arcsec 2. In the Rocky Mountains in Colorado I’ve been to sites a bit darker than this, and it’s truly spectacular.

Of course the sky is dark at night.” But that answer is wrong or, at best, incomplete, and the actual situation wasn’t obvious even to eminent scientists a century or so ago.

The night sky appears dark even though billions of stars exist in the Milky Way because the universe is finite and expanding. Dark energy stretches and dims light from distant stars, keeping much ...

The sky will still be a little bit light as civil twilight, when the sun is 6 degrees below the horizon, ends at 8:49 p.m. Jupiter will therefore be hard to see, but as the sky gets darker it will ...

As dark sky sanctuaries grow in popularity, scientists are revealing more of the benefits of darkness—from repairing DNA to improving your mental health. A panorama of dark skies over the desert ...

This Halloween night, let’s hunt down a large, famous dark nebula: Barnard 168, sometimes called the Dark Cigar. It’s located in Cygnus near the Cocoon Nebula (IC 5146).

Astronomers classify night skies from dark to bright using the Bortle Scale, ranked from one to nine. Light pollution is when artificial light washes out the night sky and makes it hard to see stars.

In 2021, the sky got 5% darker, while in 2022 it got another 2% darker. A lot of this progress was made because the city of Alpine passed a dark sky friendly lighting ordinance in 2021.

Nevada City pushes for Dark Sky certification to protect night sky In a world that's growing brighter by the year, one small gold rush town is working to keep its night dark and its skies full of ...

From road-tripping adventurers to luxury resort goers, more travelers are seeking the stars than ever before. Saudi Arabia is hoping to become the Middle East’s top astrotourism destination: it ...