Every star in the Milky Way glimmers with perfect clarity in the cloudless sky: diamonds flung across black velvet.

BBC: The Channel Islands�� surviving lore

The city's lights project ethereally across the starry, cloudless sky.

FORBES

But there might be an even more animalistic explanation why a cloudless sky buoys us up: "When it's good weather there's much more flesh on show, which cheers most people up, " says Dr Workman.

BBC: Call that a summer?

Yesterday in New York, it was the same cloudless blue sky as eleven years ago.

FORBES: A walk down Wall Street

But a clear, cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more easily than they do red light.

BBC: rainbow

But the sky was cloudless, and as the sun rose everyone settled down and some even nodded off, which Jake Early regretted, feeling that when the Union soldiers came they should find black folk not at their ease but smartly arrayed as a welcoming company of free men and women.

NPR: E.L. Doctorow on Sherman and 'The March'

As the breeze whipped the snow in little maelstroms of white, I stopped halfway and tilted my face to the cloudless, sapphire-blue sky.

BBC: Skiing peaks with a papal blessing

The sky is still a perfect cloudless blue and the forecasters have dropped their previous prediction of rain by the weekend.

BBC: US crops tell story of future world food prices

You've seen the videos -- thousands of starlings flocking in the sky to swirl and surge across wide, cloudless backdrops.

ENGADGET: Editorial: Tech is a flock of starlings