The best time to see noctilucent clouds is on clear nights between late May and mid-August, about 90 to 120 minutes after ...

The fleeting glow of noctilucent clouds is once again making its appearance in Earth’s upper atmosphere, signaling the start ...

Noctilucent clouds, Earth's highest clouds, shine blue in the twilight sky from late May to August in the northern hemisphere ...

glowing blue spiral in the sky. Images and videos posted to social media showed the strange cloud-like phenomenon, with users wondering what caused the intriguing sight. The UK Met Office, ...

It was a warm enough day, with an official high afternoon ... of clouds seemed to lie one atop the other, the western sky became for a few minutes a vast display of the powers of light and of ...

A weird blue spiral of light ... d spotted something in the sky. Auckland University physicist Professor Richard Easther told the Guardian that it was likely a cloud formed by a rocket carrying ...

Wildfire smoke as well as cirrus clouds have been ... of the sun in the sky. In the middle of the day, the sun is as high in the sky as it gets, and therefore, the light from it passes through ...