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

Here's when and where to look for the best chance of seeing Noctilucent, 'night shining' clouds in summer 2025.

Rare noctilucent clouds are showing up in places they never used to, and scientists are trying to find out why.

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

Cappucci went on: "Because the sun is near the horizon—it's sunset—it's beneath the cloud. That means the cloud ... sun and casts a shadow across the sky." Cappucci also said the dark band ...

Tuesday high pressure drifts towards the Virginia coastline changing our northwest winds more southwesterly. Above us, high ...

Noctilucent clouds usually form close to the poles, but in recent decades, they’re being spotted closer to the Equator ...

ABOUT sunset on the evening of Sunday ... which I will briefly describe. Two large clouds, covering a considerable portion of the western sky, and separated by an interval leading generally ...

a sunrise or a sunset." "And the reason is, because if the sky's clear off to where the sun is on the horizon, it can shine across the sky to the clouds above you. But it can only shine up and ...

which began more than an hour after sunset. It was certainly due to cirrus or a higher kind of cloud, because (1) parts of the illuminated sky stretched in long streaks southwards, and the glow ...