Arizona's dark skies are a haven for astronomers and photographers. Some communities are fighting to keep them that way.

London is seen from the ISS via Sen’s onboard 4k cameras. (Credit: Sen) ...

Why the 'Planet Parade' will peak this weekend and look its best until 2036 as all seven other planets in the solar system ...

Outside of a handful of valleys in Antarctica, the Atacama is the driest place on Earth. The inhospitable landscape of sand, ...