The combination of a blue sky, dark overhead, lighter near the horizon, ... This is why the deepest ocean depths appear a deep, dark blue: because all the other wavelengths get absorbed.

There’s something truly special about a night spent camping under the stars, but did you know that some places are deemed ...

10 Night sky targets to celebrate International Dark Sky Week 2025; This mellow light blue may certainly seem familiar. Depending on where and at what time of the day you look at the sky, ...

“Blue Skies” by T.C. Boyle (Liveright) There have been entire shelves of non-fiction books written about climate change. I’ve reviewed quite a few.

The sky appears blue during the day, as the short-wavelength light hitting the atmosphere is scattered in all directions, with more of the “blues” reaching our eyes than any other wavelength.

The dark-sky zones that southwestern Colorado leaders are proposing would, all combined, cover more than 3,800 square miles — the largest official area protected from artificial light on the planet.

Arizona Sky Village is what astronomers call a Dark Sky City, one of more than 20 such places across the state. Flagstaff was named the world’s first International Dark Sky City in 2001.

BLUE SKIES. By T.C. Boyle. Liveright. 384 pages. $30. There have been entire shelves of non-fiction books written about climate change. I’ve reviewed quite a few. They’re packed with truly ...