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

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

The borders of the pink sheaf were definite, and finely contrasted with the deep blue sky. As darkness ... between the time of sunset and the time at which the cloud became bright, next for ...

The clip posted by @verivanessa shows a large cloud at sunrise appearing to sit just above the horizon, with a long, dark rectangular beam stretching across an orange-pink sky. A note overlaid on ...

Footage shows the sky painted in hues of pink and violet ... enhancing the spectrum of colours visible at sunset. Pink clouds often occur when the sun is low on the horizon, as its rays pass ...

At sunset, however ... and pink to scatter and spread across the sky. The result? The mythical pink and yellow hues seen across Vancouver Island. If this cloud deck was even marginally thicker, ...

While the valleys seemed sunk in purple darkness, the fire of the sunset ... clouds was illuminated as the sun sank toward the horizon, and the sky turned vibrant shades of yellow, orange, pink ...