To see the northern lights in Colorado, a KP index of 5 or higher is usually needed. The KP index measures geomagnetic ...

ESOChile's pristine, dark desert skies are world-renowned for astronomy.But now the community says they are at risk of being ...

The area near clouds is often classified as ‘clear sky’, but a new study demonstrates the potential biases of misclassifying ...

Lenticular Clouds Lenticular clouds, with their distinctive lens shape, often hover over mountain ranges like alien ...

Chile's pristine desert skies, vital for astronomy, face threats from urban and industrial development. Astronomers, like Angel Otarola of SOCHIAS, express concerns over increasing light pollution ...

A dazzling display of the Milky Way at Cuckmere Haven and a hauntingly beautiful shot of the legendary Chanctonbury Ring are among the winners of a South Downs competition.

At night, the streets were dark, but the sky above was bright with stars. “At the next meeting (of the Board of Trustees), someone said, ‘You know, we kind of like it dark,’” recalled ...